Bondarev, B. V., and E. E. Kovtun. “A Stochastic Analog of Bogolyubov’s Second Theorem”. Ukrains’kyi Matematychnyi Zhurnal 57, no. 7 (July 25, 2005): 879–894. Accessed May 7, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3650.