GnypE. V., KodlyukT. I., and MikhailetsV. A. “Fredholm Boundary-Value Problems With Parameter in Sobolev Spaces”. Ukrains’kyi Matematychnyi Zhurnal 67, no. 5 (May 25, 2015): 584-591. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2006.