Cipta, H., Widyasari, R. ., & Batubara, F. H. (2023). Graph Coloring Implementation Using Welch Powell Algorithm In Lecture Scheduling Design For Mathmatics Department. Mathline : Jurnal Matematika Dan Pendidikan Matematika, 8(4), 1383–1398. https://doi.org/10.31943/mathline.v8i4.537