Makarov V, Romanyuk N. New properties of the FD-method in its applications to the Sturm-Liouville problems . Dopov. Nac. akad. nauk Ukr. [Internet]. 2025 Mar. 27 [cited 2026 May 10];(2):26-31. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/17433