Nanta Kumar, Umeesh, and Yaan Yee Choy. “The Solitary Waves in Fluid Filled Elastic Tube With Variable Radius”. Enhanced Knowledge in Sciences and Technology 1, no. 2 (July 29, 2021): 218–224. Accessed June 27, 2022. https://publisher.uthm.edu.my/periodicals/index.php/ekst/article/view/2768.