Kalra, S., A. I. Singh, and H. L. Vasudeva. “The Algebra A<sub>p</Sub>((0, &#8734;)) With Order Convolution and Its Multipliers”. The Journal of the Indian Mathematical Society, vol. 54, no. 1-4, Dec. 1989, pp. 47-63, https://informaticsjournals.co.in/index.php/jims/article/view/21873.