BORDBAR, Hashem, 2020, Homomorphic Image and Inverse Image of Weak Closure Operations on Ideals of BCK-Algebras. ........ [na spletu]. 2020. Vol. 4, no. 8, p. 567–578. [Dostopano 8 april 2025]. DOI https://doi.org/10.3390/math8040567. Pridobljeno s: https://repozitorij.ung.si/IzpisGradiva.php?lang=slv&id=5135