Yousef, F., Amourah, A., & Darus, M. (2016). DIFFERENTIAL SANDWICH THEOREMS FOR p-VALENT FUNCTIONS ASSOCIATED WITH A CERTAIN GENERALIZED DIFFERENTIAL OPERATOR AND INTEGRAL OPERATOR. Italian Journal of Pure and Applied Mathematics, 36, 543–556. Retrieved from https://journals.uniurb.it/index.php/ijpam/article/view/6585