Kodlyuk, T. I., V. A. Mikhailets, and N. V. Reva. “Limit Theorems for One-Dimensional Boundary-Value Problems”. Ukrains’kyi Matematychnyi Zhurnal 65, no. 1 (January 25, 2013): 70-81. Accessed April 23, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2405.