IZGI, A. Approximation by composition of Szász-Mirakyan and Durrmeyer-Chlodowsky operators. Eurasian Mathematical Journal, [S. l.], v. 3, n. 1, p. 63–71, 2012. Disponível em: https://emj.enu.kz/index.php/main/article/view/774. Acesso em: 31 oct. 2025.