Harahap, Rizki Khoiriah, and Nerli Khairani. “Penerapan Pewarnaan Graf Dalam Penjadalan Kerja Menggunakan Algoritma Welch-Powell (Studi Kasus: Rumah Sakit Grand Medistra Lubuk Pakam)”. Innovative: Journal Of Social Science Research 4, no. 2 (March 20, 2024): 3358–3369. Accessed May 31, 2026. https://j-innovative.org/index.php/Innovative/article/view/9728.