KolomiyetsV. G., KolomietsO. V., and MitropolskiyYu. A. 2003. “On the Application of the Averaging Principle in Stochastic Differential Equations of Hyperbolic Type”. Ukrains’kyi Matematychnyi Zhurnal 55 (5), 711-15. https://umj.imath.kiev.ua/index.php/umj/article/view/3946.