On Extremal Properties for the Polar Derivative of Polynomials. Analysis in Theory and Applications, [S. l.], v. 27, n. 2, p. 150–157, 2011. DOI: 10.1007/s10496-011-0150-3. Disponível em: https://global-sci.com/index.php/ata/article/view/7905. Acesso em: 5 dec. 2025.