G. R. Roshini, S. B. Chandrakala, R. Indira, and B. Sooryanarayana. “Non-Neighbor Reduced Randic and Sum-Connectivity Index”. International Journal of Mathematics And its Applications 7, no. 3 (September 15, 2019): 127–133. Accessed May 4, 2024. http://ijmaa.in/index.php/ijmaa/article/view/238.