Yefimushkin AS. On multivalent solutions of the Riemann–Hilbert problem in multiply connected domains . Dopov. Nac. akad. nauk Ukr. [Internet]. 2024 Nov. 15 [cited 2024 Dec. 23];(8):7-11. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/11280