YULDASHEV, T. Spectral problem for a Fredholm second-order integro-differential equation . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 12, p. 3–13, 2024. DOI: 10.15407/dopovidi2018.12.003. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/3047. Acesso em: 2 nov. 2024.