MORKŪNIENĖ, J. Vertybių problemos. Problemos, [S. l.], v. 16, p. 120–122, 1975. DOI: 10.15388/Problemos.1975.16.5602. Disponível em: https://www.zurnalai.vu.lt/problemos/article/view/5602. Acesso em: 10 may. 2025.