OGLEZNEV, Vitaly. The Frege–Geach Problem, Modus Ponens, and Legal Language. Problemos, [S. l.], v. 93, p. 167–176, 2018. DOI: 10.15388/Problemos.2018.93.11760. Disponível em: https://test.zurnalai.vu.lt/problemos/article/view/11948. Acesso em: 26 oct. 2025.