LIAUKSMINAS, Žygimantas. The Essence of Dialectics. Problemos, [S. l.], v. 12, p. 113–124, 1973. DOI: 10.15388/Problemos.1973.12.5531. Disponível em: https://test.zurnalai.vu.lt/problemos/article/view/5531. Acesso em: 27 oct. 2025.