MUHAMMAD DAWAMUL MUGHNI; PUTRI AISYIYAH RAKHMA DEVI. Implementation Of Teacher Presence System Using Mobile-Based Geofencing & Haversine Formula Methods. Applied Technology and Computing Science Journal, [S. l.], v. 6, n. 1, p. 31–40, 2023. DOI: 10.33086/atcsj.v6i1.4119. Disponível em: https://journal2.unusa.ac.id/index.php/ATCSJ/article/view/4119. Acesso em: 15 apr. 2024.