Atshan, W. G., Abbas, I. A. and Yalcin, S. (2020) “New Concept on Fourth-Order Differential Subordination and Superordination with Some Results for Multivalent Analytic Functions”, Journal of Al-Qadisiyah for Computer Science and Mathematics, 12(1), pp. Math Page 96–107. doi: 10.29304/jqcm.2020.12.1.681.