Jasintha Quadras, K. Arputha Christy, and A. Nelson. “Edge-Wiener Indices of $n$-Circumscribed Peri-Condensed Benzenoid Graphs”. International Journal of Mathematics And its Applications 4, no. 4 (December 15, 2016): 117–123. Accessed October 13, 2025. https://ijmaa.in/index.php/ijmaa/article/view/960.