Goshko LV, Portenko NI. Limit theorems for the number of crossings of a fixed plane by certain sequences of generalized dbffusion processes. Ukr. Mat. Zhurn. [Internet]. 1994Apr.25 [cited 2024Nov.24];46(4):357–371. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5732