KotaW. Y., and El-AshwahR. M. “Sufficient and Necessary Conditions for the Generalized Distribution Series to Be in Subclasses of Univalent Functions”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 75, no. 10, Oct. 2023, pp. 1366 -76, doi:10.3842/umzh.v75i10.7267.