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.
https://umj.imath.kiev.ua/index.php/umj/article/view/1071