AbdullayevF. G., & ÖzkartepeN. P. (2012). On the improvement of the rate of convergence of the generalized Bieberbach polynomials in domains with zero angles. Ukrains’kyi Matematychnyi Zhurnal, 64(5), 582-596. Retrieved from http://umj.imath.kiev.ua/index.php/umj/article/view/2599