STRELNIKOV, D. Boundary triples for integral systems . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 7, p. 3–9, 2024. DOI: 10.15407/dopovidi2018.07.003. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/2898. Acesso em: 14 jun. 2024.