SADYBEKOV, M. A.; TOREBEK, B. T.; TURMETOV, B. K. Construction of Green’s Function of the Neumann Problem in a Ball. Eurasian Mathematical Journal, [S. l.], v. 7, n. 2, p. 100–105, 2016. Disponível em: https://emj.enu.kz/index.php/main/article/view/638. Acesso em: 30 sep. 2025.