GUPTA, Vijay; GANCHO TACHEV, Gancho TACHEV. A modified Post Widder operators preserving eᴬˣ. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 67, n. 3, p. 599–606, 2022. DOI: 10.24193/subbmath.2022.3.11. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/1555. Acesso em: 5 feb. 2025.