FERRAND, Gérard; LESAINT, Willy; TESSIER, Alexandre. Explanations and Proof Trees. COMPUTING AND INFORMATICS, [S. l.], v. 25, n. 2-3, p. 105–122, 2012. Disponível em: https://www.cai.sk/ojs/index.php/cai/article/view/335. Acesso em: 2 may. 2024.