Holub, A. P., & Chernetska, L. O. (2013). Two-Dimensional Generalized Moment Representations and Padé Approximations for Some Humbert Series. Ukrains’kyi Matematychnyi Zhurnal, 65(10), 1315–1331. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/2511