Mattoo , S.G., Mudassir A. Bhat, and Ravinder Kumar. “On Operators Preserving Inequalities Between Polynomials”. North-Western European Journal of Mathematics, no. 8 (October 11, 2022): 187–195. Accessed November 22, 2024. https://nwejm.univ-lille.fr/index.php/nwejm/article/view/15.