Holub, A.P. and Chernetska, L.O. (2013) “Two-Dimensional Generalized Moment Representations and Padé Approximations for Some Humbert Series”, Ukrains’kyi Matematychnyi Zhurnal, 65(10), pp. 1315–1331. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2511 (Accessed: 5 December 2025).