ČEPAS, V. Psychogenetic research of intelligence: Methods, problems, and results. Psichologija, [S. l.], v. 5, p. 73–93, 1984. DOI: 10.15388/Psichol.1984.5.9131. Disponível em: https://test.zurnalai.vu.lt/psichologija/article/view/9131. Acesso em: 26 oct. 2025.