Abdullayev G. A., AbdullayevF. G., and ŞimşekD. 2019. “Bernstein – Walsh-Type Polynomial inequalities in Domains Bounded by Piecewise Asymptotically Conformal Curve With Nonzero inner angles in the Bergman Space”. Ukrains’kyi Matematychnyi Zhurnal 71 (5), 583-95. https://umj.imath.kiev.ua/index.php/umj/article/view/1459.