VAITKEVIČIUS, J. The formation of certain course concepts of ancient history in fifth grade. Psichologija, [S. l.], v. 7, p. 19–33, 1965. DOI: 10.15388/Psichol.1965.7.8907. Disponível em: https://www.journals.vu.lt/psichologija/article/view/8907.. Acesso em: 5 may. 2024.