Canigia, Boby, Ferra Yanuar, and Dodi Devianto. “ANALISIS ATRIBUT-ATRIBUT DAN POSISI OPERATOR GSM (GLOBAL SYSTEM FOR MOBILE COMMUNICATIONS) BERDASARKAN PREFERENSI PELANGGAN”. Jurnal Matematika UNAND 3, no. 4 (December 1, 2014): 78–85. Accessed November 4, 2026. https://jmua.fmipa.unand.ac.id/index.php/jmua/article/view/154.