Goshko, L.V. and Portenko, N.I. (1994) “Limit theorems for the number of crossings of a fixed plane by certain sequences of generalized dbffusion processes”, Ukrains’kyi Matematychnyi Zhurnal, 46(4), pp. 357–371. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5732 (Accessed: 12 January 2026).