KANGUZHIN, B.E.; MUSTAFINA, M.O.; KAIYRBEK, O.A. Well-posed problems for the Laplace-Beltrami operator on a stratified set consisting of punctured circles and segments. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 119, n. 3, p. 150–163, 2025. DOI: 10.31489/2025m3/150-163. Disponível em: https://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/994. Acesso em: 5 oct. 2025.