RIEČANOVÁ, Zdenka; ZAJAC, Michal. Intervals in Generalized Effect Algebras and their Sub-generalized Effect Algebras. Acta Polytechnica, Prague, Czech Republic, v. 53, n. 3, 2013. DOI: 10.14311/1817. Disponível em: https://ojs.cvut.cz/ojs/index.php/ap/article/view/1817. Acesso em: 8 apr. 2025.