Mikhailets V, Skorobohach T. Fredholm boundary- value problems with parameter in Sobolev— Slobodetsky spaces. Dopov. Nac. akad. nauk Ukr. [Internet]. 2021 Aug. 26 [cited 2025 Mar. 22];(4):3-8. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/2021-4-1