Bahri, Saeful, and Taufik Hidayatulloh. 2018. “Penerapan Coloring Graph Pada Sistem Pengingat Dan Penjadwalan Imunisasi Dasar Lengkap”. CESS (Journal of Computer Engineering, System and Science) 3 (2):128-33. https://jurnal.unimed.ac.id/2012/index.php/cess/article/view/9895.