Arsal A, Ningsih S. Operasi Cross-Union pada Koleksi Himpunan Koteri Majority. Res. Math. Nat. Sci. [Internet]. 2022 Jul. 22 [cited 2025 Apr. 4];1(2):17-21. Available from: https://journal.scimadly.com/index.php/rmns/article/view/61