On Certain Properties of the Combinations of Szász-Durrmeyer Operators. Analysis in Theory and Applications, [S. l.], v. 27, n. 2, p. 167–180, 2011. DOI: 10.1007/s10496-011-0167-7. Disponível em: https://www.global-sci.com/index.php/ata/article/view/7907. Acesso em: 6 dec. 2025.