Mokhonko, A. Z., and A. A. Mokhonko. “On the Order of Growth of the Solutions of Linear Differential Equations in the Vicinity of a Branching Point”. Ukrains’kyi Matematychnyi Zhurnal 67, no. 1 (January 25, 2015): 139-144. Accessed May 1, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1969.