Pathak, R. S., and S. M. Tripathi. “A Class of Pseudo-Differential Operators Involving Hankel Convolutions”. The Journal of the Indian Mathematical Society 70, no. 1-4 (December 1, 2003): 145–156. Accessed May 2, 2024. https://informaticsjournals.com/index.php/jims/article/view/21927.