ABBASS, Hussein Hadi. ON CLOSED BCH-ALGEBRA WITH RESPECT TO AN ELEMENT OF A BCH-ALGEBRA. Journal of Kufa for Mathematics and Computer, Kufa, Najaf, IRAQ, v. 1, n. 4, p. 5–13, 2011. DOI: 10.31642/JoKMC/2018/010402. Disponível em: https://journal.uokufa.edu.iq/index.php/jkmc/article/view/2224. Acesso em: 28 sep. 2026.