KHAN, A.; ABBAS, Z.; QASIM, M.; MURSALEEN, M. Approximation by Modified Lupaş-Stancu Operators Based on (p, q)-Integers. Eurasian Mathematical Journal, [S. l.], v. 12, n. 2, p. 39–51, 2021. DOI: 10.32523/2077-9879-2021-12-2-39-51. Disponível em: https://emj.enu.kz/index.php/main/article/view/214. Acesso em: 30 sep. 2026.