Andrusyak, I. V., and P. V. Filevych. “The Coefficients of Power Expansion and $a$-Points of an Entire Function With Borel Exceptional Value”. Ukrains’kyi Matematychnyi Zhurnal 68, no. 2 (February 25, 2016): 147-155. Accessed April 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1829.