GAO, F.; TOURLAKIS, G. A Short and Readable Proof of Cut Elimination for Two First-Order Modal Logics. Bulletin of the Section of Logic, [S. l.], v. 44, n. 3/4, p. 131–147, 2015. DOI: 10.18778/0138-0680.44.3.4.03. Disponível em: https://czasopisma.uni.lodz.pl/bulletin/article/view/16229. Acesso em: 12 may. 2024.