KARVELIS, V. The dynamics of comparison operation in construction in mentally retarded children. Psichologija, [S. l.], v. 8, p. 41–46, 1966. DOI: 10.15388/Psichol.1966.8.9296. Disponível em: https://www.journals.vu.lt/psichologija/article/view/9296.. Acesso em: 28 apr. 2024.