AbdullayevF. G. “On Some Properties of Orthogonal Polynomials over an Area in Domains of the Complex Plane. II”. Ukrains’kyi Matematychnyi Zhurnal 53, no. 1 (January 25, 2001): 3-13. Accessed November 22, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4215.