Mel'nik, Yu. I. “On Divergence of Series of Exponents Representing Functions Regular in Convex Polygons”. Ukrains’kyi Matematychnyi Zhurnal 46, no. 4 (April 25, 1994): 443–445. Accessed February 17, 2026. https://umj.imath.kiev.ua/index.php/umj/article/view/5744.