M. Perumalsamy, P. Arul Paul Sudhahar, and R. Vasanthi. “The Upper Edge Fixed Steiner Number of a Graph”. International Journal of Mathematics And its Applications 6, no. 2 - A (May 15, 2018): 337–343. Accessed July 3, 2024. https://ijmaa.in/index.php/ijmaa/article/view/680.