Kristiana, A. I., S. M. Citra, Dafik, R. Alfarisi, and R. Adawiyah. “On The Packing K-Coloring of Some Family Trees”. Statistics, Optimization & Information Computing, Vol. 13, no. 3, Sept. 2024, pp. 1291-8, doi:10.19139/soic-2310-5070-2047.