MATTOO , S.G.; BHAT , Mudassir A.; KUMAR , Ravinder. On operators preserving inequalities between polynomials. North-Western European Journal of Mathematics, [S. l.], n. 8, p. 187–195, 2022. Disponível em: https://nwejm.univ-lille.fr/index.php/nwejm/article/view/15.. Acesso em: 18 oct. 2024.