ANOP, A. A general elliptic boundary-value problem in the extended Sobolev scale . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 4, p. 7–14, 2025. DOI: 10.15407/dopovidi2014.04.007. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/15771. Acesso em: 10 may. 2026.