Asnal H, Mirnawati K, Tashid, Anam MK. Sistem Monitoring Position Lansia Menggunakan Teknologi Geofencing Berbasis Android. SATIN [Internet]. 2022Jun.23 [cited 2024Dec.22];8(1):61-8. Available from: http://jurnal.stmik-amik-riau.ac.id/index.php/satin/article/view/830