Khan, Mumtaz Ahmad, y Khvurshed Ahmad. 2005. «On a General Class of Polynomials Ln (x, Y) of Two Variables Suggested by the Polynomials Ln (x, Y) of Ragab and Ln (x) of Prabhakar and Rekha». Pro Mathematica 19 (37-38):21-38. https://revistas.pucp.edu.pe/index.php/promathematica/article/view/10225.