BARZDALTIS, Juozas. Beginning a New Stage. Problemos, [S. l.], v. 12, p. 125–127, 1973. DOI: 10.15388/Problemos.1973.12.5534. Disponível em: https://www.journals.vu.lt/problemos/article/view/5534.. Acesso em: 3 may. 2024.