ANASTASSIOU, George A.; KESTER, Merve. Quantitative uniform approximation by generalized discrete singular operators. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 60, n. 1, p. 39–60, 2015. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/5658. Acesso em: 5 feb. 2025.