Delon Sitompul, Fatimah Azzahra, Derita Ramai Durubanua, Muhammad Alfi Harahap, Ryan Pramana, Muhammad Arif, and Elsa Kardian. “Analisis Mekanisme Prosedur Kerja Berbagai Sistem Navigasi Satelit Di Dunia”. Bilangan : Jurnal Ilmiah Matematika, Kebumian dan Angkasa 3, no. 3 (June 23, 2025): 156–164. Accessed June 23, 2025. https://journal.arimsi.or.id/index.php/Bilangan/article/view/604.