MURSALEEN, M.; MOHIUDDINE, S. A. <b>Korovkin type approximation theorem for functions of two variables via statistical summability (C, 1). Acta Scientiarum. Technology, [S. l.], v. 37, n. 2, p. 237–243, 2015. DOI: 10.4025/actascitechnol.v37i2.17300. Disponível em: https://periodicos.uem.br/actascitechnol/index.php/ActaSciTechnol/article/view/17300. Acesso em: 8 nov. 2025.