RADŽVILAS, Vytautas. The Diploma Works. Problemos, [S. l.], v. 26, p. 123–125, 1981. DOI: 10.15388/Problemos.1981.26.6302. Disponível em: https://www.journals.vu.lt/problemos/article/view/6302.. Acesso em: 6 may. 2024.