Atlasiuk О.М., and Mikhailets V.А. “On Fredholm Parameter-Dependent Boundary-Value Problems in Sobolev Spaces”. Reports of the National Academy of Sciences of Ukraine, no. 6 (June 28, 2020): 3–6. Accessed June 21, 2026. https://nasu-periodicals.org.ua/index.php/dp/article/view/2020-6-1.