Mitropolsky , Yu. A., and V. G. Kolomiets. “Averaging in Stochastic System ”. Ukrains’kyi Matematychnyi Zhurnal 23, no. 3 (April 26, 1971): 318–345. Accessed December 6, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/8560.