YEFIMUSHKIN, A. S. On multivalent solutions of the Riemann–Hilbert problem in multiply connected domains . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 8, p. 7–11, 2024. DOI: 10.15407/dopovidi2016.08.007. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/11280. Acesso em: 23 dec. 2024.