Khan, Mumtaz Ahmad, and Bhagwat Swaroop Sharma. “A Study of Three Variable Analogues of Certain Fractional Integral Operators”. Pro Mathematica 24, no. 47-48 (September 7, 2010): 51–84. Accessed October 10, 2026. https://revistas.pucp.edu.pe/index.php/promathematica/article/view/10274.