SYROVATSKYI, V. About functional models of commutative systems of operators in the spaces of de Branges . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 4, p. 7–11, 2024. DOI: 10.15407/dopovidi2017.04.007. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/5396. Acesso em: 18 apr. 2026.