Zherebko, T. M. “On the Polynomial Approximation of a Conformal Mapping of a Domain With Nonzero Corner”. Ukrains’kyi Matematychnyi Zhurnal 63, no. 9 (September 25, 2011): 1285-1289. Accessed April 19, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2805.