VENSKEVIČIUS, Stasys. A New Thesis of a Doctor of Philosophy. Problemos, [S. l.], v. 6, p. 115–116, 1970. DOI: 10.15388/Problemos.1970.6.5802. Disponível em: https://test.zurnalai.vu.lt/problemos/article/view/5802. Acesso em: 28 oct. 2025.