VAITKEVIČIUS, J. On the logics and the essence of interrelation of some school subjects. Psichologija, [S. l.], v. 4, p. 13–26, 1963. DOI: 10.15388/Psichol.1963.4.8866. Disponível em: https://journals.vu.lt./psichologija/article/view/8866. Acesso em: 27 apr. 2025.