et al., Juma. “Faber Polynomial Coefficient Estimates for Subclass of Analytic Bi-Bazilevic Functions Defined by Differential Operator”. Baghdad Science Journal 16, no. 1(Suppl.) (March 17, 2019): 0248. Accessed December 6, 2019. http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/3241.