RYBELIS, Antanas. On Methodological Problems of Ethics. Problemos, [S. l.], v. 11, p. 110–114, 1973. DOI: 10.15388/Problemos.1973.11.5513. Disponível em: https://www.zurnalai.vu.lt/problemos/article/view/5513. Acesso em: 24 nov. 2025.