Friedrich T. Sommer - Publications

Affiliations: 
University of California, Berkeley, Berkeley, CA, United States 
Area:
Memory, Sensory systems

71/91 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2023 Agarwal G, Lustig B, Akera S, Pastalkova E, Lee AK, Sommer FT. News without the buzz: reading out weak theta rhythms in the hippocampus. Biorxiv : the Preprint Server For Biology. PMID 38187593 DOI: 10.1101/2023.12.22.573160  0.503
2023 Kymn CJ, Kleyko D, Frady EP, Bybee C, Kanerva P, Sommer FT, Olshausen BA. Computing with Residue Numbers in High-Dimensional Representation. Arxiv. PMID 37986727  0.589
2023 Li Z, Chen Y, Sommer FT. Learning Energy-Based Models in High-Dimensional Spaces with Multiscale Denoising-Score Matching. Entropy (Basel, Switzerland). 25. PMID 37895489 DOI: 10.3390/e25101367  0.757
2023 Bybee C, Kleyko D, Nikonov DE, Khosrowshahi A, Olshausen BA, Sommer FT. Efficient optimization with higher-order ising machines. Nature Communications. 14: 6033. PMID 37758716 DOI: 10.1038/s41467-023-41214-9  0.544
2023 Gorin AS, Miao Y, Ahn S, Suresh V, Su Y, Ciftcioglu UM, Sommer FT, Hirsch JA. Local interneurons in the murine visual thalamus have diverse receptive fields and can provide feature selective inhibition to relay cells. Biorxiv : the Preprint Server For Biology. PMID 37609295 DOI: 10.1101/2023.08.10.549394  0.756
2023 Kleyko D, Bybee C, Huang PC, Kymn CJ, Olshausen BA, Frady EP, Sommer FT. Efficient Decoding of Compositional Structure in Holistic Representations. Neural Computation. 1-28. PMID 37187162 DOI: 10.1162/neco_a_01590  0.587
2023 Kleyko D, Rosato A, Frady EP, Panella M, Sommer FT. Perceptron Theory Can Predict the Accuracy of Neural Networks. Ieee Transactions On Neural Networks and Learning Systems. PMID 37022402 DOI: 10.1109/TNNLS.2023.3237381  0.748
2022 Kleyko D, Davies M, Frady EP, Kanerva P, Kent SJ, Olshausen BA, Osipov E, Rabaey JM, Rachkovskij DA, Rahimi A, Sommer FT. Vector Symbolic Architectures as a Computing Framework for Emerging Hardware. Proceedings of the Ieee. Institute of Electrical and Electronics Engineers. 110: 1538-1571. PMID 37868615  0.571
2022 Toker D, Pappas I, Lendner JD, Frohlich J, Mateos DM, Muthukumaraswamy S, Carhart-Harris R, Paff M, Vespa PM, Monti MM, Sommer FT, Knight RT, D'Esposito M. Consciousness is supported by near-critical slow cortical electrodynamics. Proceedings of the National Academy of Sciences of the United States of America. 119. PMID 35145021 DOI: 10.1073/pnas.2024455119  0.755
2021 Kleyko D, Frady EP, Sommer FT. Cellular Automata Can Reduce Memory Requirements of Collective-State Computing. Ieee Transactions On Neural Networks and Learning Systems. PMID 34699370 DOI: 10.1109/TNNLS.2021.3119543  0.735
2021 Frady EP, Kleyko D, Sommer FT. Variable Binding for Sparse Distributed Representations: Theory and Applications. Ieee Transactions On Neural Networks and Learning Systems. PMID 34478381 DOI: 10.1109/TNNLS.2021.3105949  0.746
2021 Li Z, Chen Y, Sommer FT. A Neural Network MCMC Sampler That Maximizes Proposal Entropy. Entropy (Basel, Switzerland). 23. PMID 33668743 DOI: 10.3390/e23030269  0.769
2020 Frady EP, Kent SJ, Olshausen BA, Sommer FT. Resonator Networks, 1: An Efficient Solution for Factoring High-Dimensional, Distributed Representations of Data Structures. Neural Computation. 1-21. PMID 33080162 DOI: 10.1162/neco_a_01331  0.788
2020 Kent SJ, Frady EP, Sommer FT, Olshausen BA. Resonator Networks, 2: Factorization Performance and Capacity Compared to Optimization-Based Methods. Neural Computation. 1-57. PMID 33080160 DOI: 10.1162/neco_a_01329  0.778
2020 Ciftcioglu UM, Suresh V, Ding KR, Sommer FT, Hirsch JA. Visual information processing in the ventral division of the mouse lateral geniculate nucleus of the thalamus. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. PMID 32350041 DOI: 10.1523/JNEUROSCI.2602-19.2020  0.784
2020 Toker D, Sommer FT, D'Esposito M. A simple method for detecting chaos in nature. Communications Biology. 3: 11. PMID 31925289 DOI: 10.1038/s42003-019-0715-9  0.732
2020 Toker D, Sommer FT, D'Esposito M. A simple method for detecting chaos in nature. Communications Biology. 3: 11. PMID 31909203 DOI: 10.1038/s42003-019-0715-9  0.732
2019 Frady EP, Sommer FT. Robust computation with rhythmic spike patterns. Proceedings of the National Academy of Sciences of the United States of America. PMID 31431524 DOI: 10.1073/pnas.1902653116  0.782
2019 Toker D, Sommer FT. Information integration in large brain networks. Plos Computational Biology. 15: e1006807. PMID 30730907 DOI: 10.1371/Journal.Pcbi.1006807  0.779
2018 Frady EP, Kleyko D, Sommer FT. A Theory of Sequence Indexing and Working Memory in Recurrent Neural Networks. Neural Computation. 1-65. PMID 29652585 DOI: 10.1162/neco_a_01084  0.764
2018 Bouchard KE, Aimone JB, Chun M, Dean T, Denker M, Diesmann M, Donofrio DD, Frank LM, Kasthuri N, Koch C, Rubel O, Simon HD, Sommer FT, Prabhat. International Neuroscience Initiatives through the Lens of High-Performance Computing Ieee Computer. 51: 50-59. DOI: 10.1109/Mc.2018.2141039  0.306
2017 Soto-Sánchez C, Wang X, Vaingankar V, Sommer FT, Hirsch JA. Spatial scale of receptive fields in the visual sector of the cat thalamic reticular nucleus. Nature Communications. 8: 800. PMID 28986534 DOI: 10.1038/S41467-017-00762-7  0.795
2016 Suresh V, Çiftçioğlu UM, Wang X, Lala BM, Ding KR, Smith WA, Sommer FT, Hirsch JA. Synaptic Contributions to Receptive Field Structure and Response Properties in the Rodent Lateral Geniculate Nucleus of the Thalamus. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 36: 10949-10963. PMID 27798177 DOI: 10.1523/JNEUROSCI.1045-16.2016  0.784
2016 Knoblauch A, Sommer FT. Structural Plasticity, Effectual Connectivity, and Memory in Cortex. Frontiers in Neuroanatomy. 10: 63. PMID 27378861 DOI: 10.3389/fnana.2016.00063  0.647
2015 Hirsch JA, Wang X, Sommer FT, Martinez LM. How inhibitory circuits in the thalamus serve vision. Annual Review of Neuroscience. 38: 309-29. PMID 26154979 DOI: 10.1146/annurev-neuro-071013-014229  0.664
2015 Hirsch JA, Wang X, Sommer FT, Martinez LM. How Inhibitory Circuits in the Thalamus Serve Vision Annual Review of Neuroscience. 38: 309-329. DOI: 10.1146/annurev-neuro-071013-014229  0.534
2014 Knoblauch A, Körner E, Körner U, Sommer FT. Structural synaptic plasticity has high memory capacity and can explain graded amnesia, catastrophic forgetting, and the spacing effect. Plos One. 9: e96485. PMID 24858841 DOI: 10.1371/journal.pone.0096485  0.629
2014 Agarwal G, Stevenson IH, Berényi A, Mizuseki K, Buzsáki G, Sommer FT. Spatially distributed local fields in the hippocampus encode rat position. Science (New York, N.Y.). 344: 626-30. PMID 24812401 DOI: 10.1126/Science.1250444  0.554
2014 Martinez LM, Molano-Mazón M, Wang X, Sommer FT, Hirsch JA. Statistical wiring of thalamic receptive fields optimizes spatial sampling of the retinal image. Neuron. 81: 943-56. PMID 24559681 DOI: 10.1016/j.neuron.2013.12.014  0.639
2013 Little DY, Sommer FT. Maximal mutual information, not minimal entropy, for escaping the "Dark Room". The Behavioral and Brain Sciences. 36: 220-1. PMID 23663756 DOI: 10.1017/S0140525X12002415  0.718
2013 Little DY, Sommer FT. Learning and exploration in action-perception loops. Frontiers in Neural Circuits. 7: 37. PMID 23579347 DOI: 10.3389/Fncir.2013.00037  0.716
2012 Vaingankar V, Soto-Sanchez C, Wang X, Sommer FT, Hirsch JA. Neurons in the thalamic reticular nucleus are selective for diverse and complex visual features. Frontiers in Integrative Neuroscience. 6: 118. PMID 23269915 DOI: 10.3389/Fnint.2012.00118  0.809
2011 Wang X, Sommer FT, Hirsch JA. Inhibitory circuits for visual processing in thalamus. Current Opinion in Neurobiology. 21: 726-33. PMID 21752634 DOI: 10.1016/j.conb.2011.06.004  0.678
2011 Wang X, Vaingankar V, Soto Sanchez C, Sommer FT, Hirsch JA. Thalamic interneurons and relay cells use complementary synaptic mechanisms for visual processing. Nature Neuroscience. 14: 224-31. PMID 21170053 DOI: 10.1038/Nn.2707  0.807
2010 Wang X, Hirsch JA, Sommer FT. Recoding of sensory information across the retinothalamic synapse. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 30: 13567-77. PMID 20943898 DOI: 10.1523/JNEUROSCI.0910-10.2010  0.64
2010 Koepsell K, Wang X, Hirsch JA, Sommer FT. Exploring the function of neural oscillations in early sensory systems. Frontiers in Neuroscience. 4: 53. PMID 20582272 DOI: 10.3389/Neuro.01.010.2010  0.806
2010 Knoblauch A, Palm G, Sommer FT. Memory capacities for synaptic and structural plasticity. Neural Computation. 22: 289-341. PMID 19925281 DOI: 10.1162/neco.2009.08-07-588  0.714
2010 Coulter WK, Hillar CJ, Isley G, Sommer FT. Adaptive compressed sensing - A new class of self-organizing coding models for neuroscience Icassp, Ieee International Conference On Acoustics, Speech and Signal Processing - Proceedings. 5494-5497. DOI: 10.1109/ICASSP.2010.5495209  0.516
2010 Isely G, Hillar CJ, Sommer FT. Deciphering subsampled data: Adaptive compressive sampling as a principle of brain communication Advances in Neural Information Processing Systems 23: 24th Annual Conference On Neural Information Processing Systems 2010, Nips 2010 0.72
2009 Monaci G, Vandergheynst P, Sommer FT. Learning bimodal structure in audio-visual data. Ieee Transactions On Neural Networks / a Publication of the Ieee Neural Networks Council. 20: 1898-910. PMID 19963447 DOI: 10.1109/Tnn.2009.2032182  0.696
2009 Koepsell K, Wang X, Vaingankar V, Wei Y, Wang Q, Rathbun DL, Usrey WM, Hirsch JA, Sommer FT. Retinal oscillations carry visual information to cortex. Frontiers in Systems Neuroscience. 3: 4. PMID 19404487 DOI: 10.3389/Neuro.06.004.2009  0.79
2008 Koepsell K, Sommer FT. Information transmission in oscillatory neural activity. Biological Cybernetics. 99: 403-16. PMID 18985377 DOI: 10.1007/S00422-008-0273-6  0.776
2008 Teeters JL, Harris KD, Millman KJ, Olshausen BA, Sommer FT. Data sharing for computational neuroscience. Neuroinformatics. 6: 47-55. PMID 18259695 DOI: 10.1007/s12021-008-9009-y  0.611
2008 Goodhill G, Baker C, Balasubramanian V, Bazhenov M, Beck J, Becker S, Bethge M, Boahen K, Boden M, Bonin V, Bouret S, Fairhall A, Flash T, French R, Gillies A, ... ... Sommer F, et al. Network: Computation in Neural Systems: Editorial Network: Computation in Neural Systems. 19: 1-2. DOI: 10.1080/09548980801915409  0.618
2008 Monaci G, Sommer FT, Vandergheynst P. Learning sparse generative models of audiovisual signals European Signal Processing Conference 0.635
2007 Wang X, Wei Y, Vaingankar V, Wang Q, Koepsell K, Sommer FT, Hirsch JA. Feedforward excitation and inhibition evoke dual modes of firing in the cat's visual thalamus during naturalistic viewing. Neuron. 55: 465-78. PMID 17678858 DOI: 10.1016/J.Neuron.2007.06.039  0.785
2007 Rehn M, Sommer FT. A network that uses few active neurones to code visual input predicts the diverse shapes of cortical receptive fields. Journal of Computational Neuroscience. 22: 135-46. PMID 17053994 DOI: 10.1007/S10827-006-0003-9  0.634
2007 Knoblauch A, Sommer FT, Gewaltig M, Kupper R, Körner U, Körner E. A model for structural plasticity in neocortical associative networks trained by the hippocampus Bmc Neuroscience. 8. DOI: 10.1186/1471-2202-8-S2-S14  0.603
2006 Rehn M, Sommer FT. Storing and restoring visual input with collaborative rank coding and associative memory Neurocomputing. 69: 1219-1223. DOI: 10.1016/J.Neucom.2005.12.080  0.594
2005 Martinez LM, Wang Q, Reid RC, Pillai C, Alonso JM, Sommer FT, Hirsch JA. Receptive field structure varies with layer in the primary visual cortex. Nature Neuroscience. 8: 372-9. PMID 15711543 DOI: 10.1038/Nn1404  0.641
2005 George D, Sommer FT. Computing with inter-spike interval codes in networks of integrate and fire neurons Neurocomputing. 65: 415-420. DOI: 10.1016/j.neucom.2004.10.038  0.365
2005 Sommer FT, Wennekers T. Synfire chains with conductance-based neurons: Internal timing and coordination with timed input Neurocomputing. 65: 449-454. DOI: 10.1016/j.neucom.2004.10.015  0.732
2004 Knoblauch A, Sommer FT. Spike-timing-dependent synaptic plasticity can form "zero lag links" for cortical oscillations Neurocomputing. 58: 185-190. DOI: 10.1016/j.neucom.2004.01.041  0.631
2003 Hirsch JA, Martinez LM, Pillai C, Alonso JM, Wang Q, Sommer FT. Functionally distinct inhibitory neurons at the first stage of visual cortical processing. Nature Neuroscience. 6: 1300-8. PMID 14625553 DOI: 10.1038/Nn1152  0.658
2003 Sommer FT, Wennekers T. Models of distributed associative memory networks in the brain Theory in Biosciences. 122: 55-69. DOI: 10.1078/1431-7613-00074  0.739
2003 Wennekers T, Sommer F, Aertsen A. Editorial: Cell assemblies Theory in Biosciences. 122: 1-4. DOI: 10.1078/1431-7613-00070  0.704
2003 Schmitt V, Kötter R, Sommer FT. The impact of thalamo-cortical projections on activity spread in cortex Neurocomputing. 52: 919-924. DOI: 10.1016/S0925-2312(02)00837-8  0.761
2003 Knoblauch A, Sommer FT. Synaptic plasticity, conduction delays, and inter-areal phase relations of spike activity in a model of reciprocally connected areas Neurocomputing. 52: 301-306. DOI: 10.1016/S0925-2312(02)00792-0  0.599
2002 Knoblauch A, Wennekers T, Sommer FT. Is voltage-dependent synaptic transmission in NMDA receptors a robust mechanism for working memory? Neurocomputing. 44: 19-24. DOI: 10.1016/S0925-2312(02)00364-8  0.77
2001 Sommer FT, Wennekers T. Associative memory in networks of spiking neurons. Neural Networks : the Official Journal of the International Neural Network Society. 14: 825-34. PMID 11665774 DOI: 10.1016/S0893-6080(01)00064-8  0.754
2001 Sommer FT, Wennekers T. Associative memory in a pair of cortical cell groups with reciprocal projections Neurocomputing. 38: 1575-1580. DOI: 10.1016/S0925-2312(01)00563-X  0.751
2001 Vollmer U, Sommer FT. Coexistence of short and long term memory in a model network of realistic neurons Neurocomputing. 38: 1031-1036. DOI: 10.1016/S0925-2312(01)00384-8  0.341
2000 Sommer FT, Wennekers T. Modelling studies on the computational function of fast temporal structure in cortical circuit activity. Journal of Physiology, Paris. 94: 473-88. PMID 11165914 DOI: 10.1016/S0928-4257(00)01098-6  0.749
2000 Kötter R, Sommer FT. Global relationship between anatomical connectivity and activity propagation in the cerebral cortex. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences. 355: 127-34. PMID 10703048 DOI: 10.1098/rstb.2000.0553  0.362
2000 Sommer FT. On cell assemblies in a cortical column Neurocomputing. 32: 517-522. DOI: 10.1016/S0925-2312(00)00207-1  0.324
1999 Sommer FT, Palm G. Improved bidirectional retrieval of sparse patterns stored by Hebbian learning. Neural Networks : the Official Journal of the International Neural Network Society. 12: 281-297. PMID 12662704 DOI: 10.1016/S0893-6080(98)00125-7  0.583
1999 Baune A, Sommer FT, Erb M, Wildgruber D, Kardatzki B, Palm G, Grodd W. Dynamical cluster analysis of cortical fMRI activation. Neuroimage. 9: 477-89. PMID 10329287 DOI: 10.1006/nimg.1999.0429  0.548
1999 Wennekers T, Sommer FT. Gamma-oscillations support optimal retrieval in associative memories of two-compartment neurons Neurocomputing. 26: 573-578. DOI: 10.1016/S0925-2312(99)00036-3  0.745
1998 Sommer FT, Dayan P. Bayesian retrieval in associative memories with storage errors. Ieee Transactions On Neural Networks / a Publication of the Ieee Neural Networks Council. 9: 705-13. PMID 18252493 DOI: 10.1109/72.701183  0.457
1996 Schwenker F, Sommer FT, Palm G. Iterative retrieval of sparsely coded associative memory patterns Neural Networks. 9: 445-455. DOI: 10.1016/0893-6080(95)00112-3  0.314
1992 Palm G, Sommer FT. Information capacity in recurrent mcculloch-pitts networks with sparsely coded memory states Network: Computation in Neural Systems. 3: 177-186. DOI: 10.1088/0954-898X_3_2_006  0.372
Low-probability matches (unlikely to be authored by this person)
2015 Hillar CJ, Sommer FT. When Can Dictionary Learning Uniquely Recover Sparse Data from Subsamples? Ieee Transactions On Information Theory. 61: 6290-6297. DOI: 10.1109/Tit.2015.2460238  0.294
2016 Bouchard KE, Aimone JB, Chun M, Dean T, Denker M, Diesmann M, Donofrio DD, Frank LM, Kasthuri N, Koch C, Ruebel O, Simon HD, Sommer FT, Prabhat. High-Performance Computing in Neuroscience for Data-Driven Discovery, Integration, and Dissemination. Neuron. 92: 628-631. PMID 27810006 DOI: 10.1016/J.Neuron.2016.10.035  0.267
2013 Teeters J, Christopher W, Thielk M, Sommer F. Specification of experiment stimuli for sharing electrophysiology data F1000research. 4. DOI: 10.7490/F1000Research.1094291.1  0.266
2001 Wichert A, Walter H, Groen G, Baune A, Grothe J, Wunderlich A, Sommer FT. Detection of delay selective activity during a working memory task by explorative data analysis Neuroimage. 13: 282. DOI: 10.1016/S1053-8119(01)91625-8  0.264
2020 Ježek P, Teeters JL, Sommer FT. NWB Query Engines: Tools to Search Data Stored in Neurodata Without Borders Format. Frontiers in Neuroinformatics. 14: 27. PMID 33041776 DOI: 10.3389/fninf.2020.00027  0.262
2015 Teeters JL, Godfrey K, Young R, Dang C, Friedsam C, Wark B, Asari H, Peron S, Li N, Peyrache A, Denisov G, Siegle JH, Olsen SR, Martin C, Chun M, ... ... Sommer FT, et al. Neurodata Without Borders: Creating a Common Data Format for Neurophysiology. Neuron. 88: 629-634. PMID 26590340 DOI: 10.1016/J.Neuron.2015.10.025  0.255
2006 Sommer FT, Kanerva P. Can neural models of cognition benefit from the advantages of connectionism? Behavioral and Brain Sciences. 29: 86-87. DOI: 10.1017/S0140525X06379022  0.249
2016 Wiener M, Sommer FT, Ives ZG, Poldrack RA, Litt B. Enabling an Open Data Ecosystem for the Neurosciences. Neuron. 92: 617-621. PMID 27810004 DOI: 10.1016/j.neuron.2016.10.037  0.245
2009 Teeters JL, Sommer FT. CRCNS.ORG: a repository of high-quality data sets and tools for computational neuroscience Bmc Neuroscience. 10. DOI: 10.1186/1471-2202-10-S1-S6  0.243
2016 Wiener M, Sommer FT, Ives ZG, Poldrack RA, Litt B. Enabling an Open Data Ecosystem for the Neurosciences. Neuron. 92: 929. PMID 27883904 DOI: 10.1016/j.neuron.2016.11.009  0.239
2013 Teeters JL, Sommer FT. epHDF – a standard for storing electrophysiology data in HDF5 F1000research. 4. DOI: 10.7490/F1000Research.1094289.1  0.231
2004 Glatting G, Mottaghy FM, Karitzky J, Baune A, Sommer FT, Landwehrmeyer GB, Reske SN. Improving binding potential analysis in [11C]raclopride PET studies using cluster analysis. Medical Physics. 31: 902-6. PMID 15125008 DOI: 10.1118/1.1668392  0.222
2017 Bouchard KE, Bujan AF, Chang EF, Sommer FT. Sparse coding of ECoG signals identifies interpretable components for speech control in human sensorimotor cortex. Conference Proceedings : ... Annual International Conference of the Ieee Engineering in Medicine and Biology Society. Ieee Engineering in Medicine and Biology Society. Annual Conference. 2017: 3636-3639. PMID 29060686 DOI: 10.1109/EMBC.2017.8037645  0.21
2014 Mobin SA, Arnemann JA, Sommer FT. Information-based learning by agents in unbounded state spaces Advances in Neural Information Processing Systems. 4: 3023-3031.  0.098
2022 Poline JB, Kennedy DN, Sommer FT, Ascoli GA, Van Essen DC, Ferguson AR, Grethe JS, Hawrylycz MJ, Thompson PM, Poldrack RA, Ghosh SS, Keator DB, Athey TL, Vogelstein JT, Mayberg HS, et al. Is Neuroscience FAIR? A Call for Collaborative Standardisation of Neuroscience Data. Neuroinformatics. PMID 35061216 DOI: 10.1007/s12021-021-09557-0  0.094
1998 Sommer FT, Palm G. Bidirectional retrieval from associative memory Advances in Neural Information Processing Systems. 675-681.  0.092
1988 Hau K, Frodl P, Sommer F, Wahl F. A Microscopic Theory of a Single Hydrogen Centre in Niobium Zeitschrift Fur Naturforschung - Section a Journal of Physical Sciences. 43: 914-922. DOI: 10.1515/zna-1988-1102  0.061
1988 Sommer FT, Hau K, Frodl P, Wahl F. Calculation of the Excitation Energies of a Hydrogen Impurity in Niobium Zeitschrift Fur Naturforschung - Section a Journal of Physical Sciences. 43: 923-929. DOI: 10.1515/zna-1988-1103  0.029
2013 Berens W, Knauer T, Sommer F, Wöhrmann A. Controller gesucht! — Erwartungen an Controller und ihre Ausbildung Controlling & Management Review. 57: 8-16. DOI: 10.1365/S12176-013-0704-7  0.01
1990 Frodl P, Sommer FT, Hau K, Wahl F. On the Effective Interaction of two Hydrogen Centres in Niobium Zeitschrift Fur Naturforschung - Section a Journal of Physical Sciences. 45: 857-866. DOI: 10.1515/zna-1990-0704  0.01
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