Patty H. HASIL KALI LANGSUNG S-NEAR-RING DAN S-NEAR-RING BEBAS. BAREKENG: J. Math. & App. [Internet]. 1Dec.2014 [cited 18Apr.2024];8(2):1-. Available from: https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/265