Mokhonko, O. A., I. Ya. Ivasiuk, and Yu. M. Berezansky. 2008. “Recursion Relation for Orthogonal Polynomials on the Complex Plane”. Methods of Functional Analysis and Topology 14 (2): 108-16. https://zen.imath.kiev.ua/index.php/mfat/article/view/374.