Bratiichuk, N. S. “Potential Method in the Limit Problems for the Processes With Independent Increments”. Ukrains’kyi Matematychnyi Zhurnal 67, no. 8 (August 25, 2015): 1019–1029. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/2042.