A General Family of the Srivastava-Gupta Operators Preserving Linear Functions. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 11, n. 3, p. 575–579, 2018. DOI: 10.29020/nybg.ejpam.v11i3.3314. Disponível em: https://www.ejpam.com/index.php/ejpam/article/view/3314. Acesso em: 22 dec. 2024.