JUN, Y. B.; XIN, X. L. Complex Fuzzy Sets with Application in BCK/BCI-Algebras. Bulletin of the Section of Logic, [S. l.], v. 48, n. 3, p. 173–185, 2019. DOI: 10.18778/0138-0680.48.3.02. Disponível em: https://czasopisma.uni.lodz.pl/bulletin/article/view/6204. Acesso em: 2 may. 2024.