Vasu, A. C., V. V. Subrahmanya Sastri, and C. S. Venkataraman. “On a New Class of Convolutions and Euler Products”. The Journal of the Indian Mathematical Society 54, no. 1-4 (December 1, 1989): 219–232. Accessed April 27, 2024. http://informaticsjournals.com/index.php/jims/article/view/21899.