Zak A. Z. : Development of the capacity for mental behavior in I-Õ grade school-children 83'1 p.43
Zak A. Z. :
Relation between learning and mental development in schoolchildren
85'3 p.49
Zak A. Z. :
Typology of thought's microdevelopment
86'5 p.96
Zak A. Z. :
"Author's thinking" in younger schoolchildren making up a problem
88'2 p.69