Approximation by a Complex Post-Widder Type Operator. Analysis in Theory and Applications, [S. l.], v. 34, n. 4, p. 297–305, 2018. DOI: 10.4208/ata.OA-2018-0003. Disponível em: https://www.global-sci.com/index.php/ata/article/view/8153. Acesso em: 5 dec. 2025.