KOLANY, A. A general method of solving Smullyan’s puzzles. Logic and Logical Philosophy, [S. l.], v. 4, n. 4, p. 97–103, 2003. DOI: 10.12775/LLP.1996.004. Disponível em: https://apcz.umk.pl/LLP/article/view/LLP.1996.004. Acesso em: 27 may. 2024.