R. Ponraj, S. Sathish Narayanan, and A. M. S. Ramasamy. “Parity Combination Cordial Labeling of Graphs”. Jordan Journal of Mathematics and Statistics 8, no. 4 (May 18, 2025): 293–308. Accessed October 3, 2025. https://jjms.yu.edu.jo/index.php/jjms/article/view/1054.