an Entity references as follows:
Petr Ivanovich Zinchenko (Russian: Пётр Иванович Зинченко) (12 July 1903 – 17 February 1969) was a Soviet developmental psychologist, a student of Lev Vygotsky and Alexei Leontiev and himself one of the major representatives of the . In 1963, Zinchenko founded and headed the department of psychology at Kharkiv University until his death in 1969. His son is a contemporary Russian psychologist .