ORHAN, Sevda; KOLAY, Burçak. Korovkin type approximation for double sequences via statistical A-summation process on modular spaces. Studia Universitatis Babeș-Bolyai Mathematica, [S. l.], v. 63, n. 1, p. 125–140, 2018. DOI: 10.24193/subbmath.2018.1.08. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/1983. Acesso em: 5 feb. 2025.