Patty H, Persulessy E, Matakupan R. KARAKTERISASI ELEMEN IDEMPOTEN CENTRAL. BAREKENG: J. Math. & App. [Internet]. 1Mar.2011 [cited 26Apr.2024];5(1):33-9. Available from: https://ojs3.unpatti.ac.id/index.php/barekeng/article/view/184