PRZYBYŁO, Sławomir. Double Equivalential Algebras. Bulletin of the Section of Logic, Poland, p. 25 pp., 2026. DOI: 10.18778/0138-0680.2026.15. Disponível em: https://www.czasopisma.uni.lodz.pl/bulletin/article/view/27148. Acesso em: 5 sep. 2026.