BUTZ, C. Finitely Presented Heyting Algebras. BRICS Report Series, [S. l.], v. 5, n. 30, 1998. DOI: 10.7146/brics.v5i30.19436. Disponível em: https://tidsskrift.dk/brics/article/view/19436. Acesso em: 25 apr. 2024.