STULPINAS , T. Some theoretical questions on differential teaching in secondary schools. Psichologija, [S. l.], v. 10, p. 15–20, 1969. DOI: 10.15388/Psichol.1969.10.9228. Disponível em: https://test.zurnalai.vu.lt/psichologija/article/view/9228. Acesso em: 27 oct. 2025.