Rezeki, E. S., S. Suwilo, and M. Mardiningsih. “A Class of Primitive Two-Colored Digraph With Large Competition Index”. Sinkron : Jurnal Dan Penelitian Teknik Informatika, vol. 7, no. 3, July 2023, pp. 1792-7, doi:10.33395/sinkron.v8i3.12744.