Suy K, Sufajar Butsianto, Supriyanto. Sistem Informasi Keamanan Kunci Pintu Pintar Berbasis Internet of Things Notifikasi Real-Time Berbasis WhatsApp. bulletincsr [Internet]. 2025Aug.5 [cited 2026Jun.1];5(5):886-97. Available from: http://www.hostjournals.com/bulletincsr/article/view/720