Nikolay Yakovlevich
Grot

Moscow State University


Wilhelm
Wundt

University of Leipzig


Georgij
Chelpanov

University of Moscow


Gustav Gustavovich
Shpet

University of Moscow


Lev Semionovitch
Vygotsky

Psychological Institute, Moscow

Irène Léopoldoff
Martin

Geneva University, Switzerland
(Options)

Irène MartinX