Qasem, M. R., Arif , N. E. ., & Mohammed, A. S. . (2023). Sum Graph of Z_(p^n q^m ) Groups and Some Topological Indices of G+ (Z_(p^n q^m )). Samarra Journal of Pure and Applied Science, 5(1), 192–203. https://doi.org/10.54153/sjpas.2023.v5i1.486