GoshkoL. V., and PortenkoN. I. “Limit Theorems for the Number of Crossings of a Fixed Plane by Certain Sequences of Generalized Dbffusion Processes”. Ukrains’kyi Matematychnyi Zhurnal 46, no. 4 (April 25, 1994): 357–371. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5732.