Bondarev, B. V., & Kovtun, E. E. (2006). Order reduction for a system of stochastic differential equations with a small parameter in the coefficient of the leading derivative. Estimate for the rate of convergence. Ukrains’kyi Matematychnyi Zhurnal, 58(12), 1587–1601. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/3557