VAIŠVILA, Alfonsas. On the Formalization Method of Intensional Relations in Konstantinas Raičinskis’ Theory of Concepts. Problemos, [S. l.], v. 12, p. 79–87, 1973. DOI: 10.15388/Problemos.1973.12.5527. Disponível em: https://test.zurnalai.vu.lt/problemos/article/view/5527. Acesso em: 26 oct. 2025.