SKERSYTĖ, Jūratė. Gnoseological Interpretation of the Logical Deduction Theory. Problemos, [S. l.], v. 4, p. 18–28, 1969. DOI: 10.15388/Problemos.1969.4.5757. Disponível em: https://www.journals.vu.lt/problemos/article/view/5757.. Acesso em: 17 aug. 2024.