Renato Leme, Giorgio Venturi, and Bruno Lopes. 2022. Coq Formalization of a Tableau for the Classical-Intuitionistic Propositional Fragment of Ecumenical Logic. In Anais do III Workshop Brasileiro de Lógica, julho 31, 2022, Niterói, Brasil. SBC, Porto Alegre, Brasil, 25-32. DOI: https://doi.org/10.5753/wbl.2022.223071.