ARSAL, Armayani; NINGSIH, Setia. Operasi Cross-Union pada Koleksi Himpunan Koteri Majority. Research in the Mathematical and Natural Sciences, [S. l.], v. 1, n. 2, p. 17–21, 2022. DOI: 10.55657/rmns.v1i2.61. Disponível em: https://journal.scimadly.com/index.php/rmns/article/view/61. Acesso em: 4 apr. 2025.