Mynbayeva, S. T., Stanzhitskii, A. N., & Marchuk, N. A. (2020). Averaging in boundary-value problems for systems of differential and integrodifferential equations. Ukrains’kyi Matematychnyi Zhurnal, 72(2), 245-266. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/1071