A. AL-Tarimshawy, “The Singularity of Bipartite Graph”, Iraqi Journal of Science, vol. 54, no. 3. Mathematics conf, pp. 813–816, Feb. 2024, Accessed: Dec. 16, 2025. [Online]. Available: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12462