KOSMAKOVA, M.T.; RAMAZANOV, M.I.; TOKESHEVA, A.S.; KHAIRKULOVA, A.A. On the non-uniqueness of solution to the homogeneous boundary value problem for the heat conduction equation in an angular domain. Bulletin of the Karaganda University. Mathematics Series, [S. l.], v. 84, n. 4, p. 80–87, 2016. DOI: 10.31489/2016m4/80-87. Disponível em: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/128. Acesso em: 23 aug. 2025.