MORKŪNAS, Zigmas. On Interaction or Methods of Scientific Cognition of Society. Problemos, [S. l.], v. 5, p. 29–34, 1970. DOI: 10.15388/Problemos.1970.5.5776. Disponível em: https://www.journals.vu.lt/problemos/article/view/5776.. Acesso em: 1 may. 2024.