Abdurahim, A., R. Satriyantara, F. Maulana, I. G. Wardhana, and N. Robbaniyyah. “Sombor Indices of Prime Coprime Graph for Integer Modulo Group”. Jurnal Diferensial, Vol. 7, no. 2, Nov. 2025, pp. 123-30, doi:10.35508/jd.v7i2.21120.