LEONAVIČIUS, Juozas. Laboratory of Sociological Research at the Kaunas Antanas Sniečkus Polytechnic Institute. Problemos, [S. l.], v. 15, p. 104–106, 1975. DOI: 10.15388/Problemos.1975.15.5579. Disponível em: https://test.zurnalai.vu.lt/problemos/article/view/5579. Acesso em: 26 oct. 2025.