AMER, A. . ON THE UNIVALENCE OF A NEW INTEGRAL PERATOR . مجلة كلية التربية العلمية, [S. l.], n. 4, 2017. DOI: 10.37376/fesj.vi4.453. Disponível em: https://next.fannak.com/index.php/FESJ/article/view/453. Acesso em: 23 8. 2026.