MynbayevaS. T., StanzhitskiiA. N., and MarchukN. A. “Averaging in Boundary-Value Problems for Systems of Differential and Integrodifferential Equations”. Ukrains’kyi Matematychnyi Zhurnal 72, no. 2 (February 15, 2020): 245-266. Accessed December 22, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1071.