Kosmakova M, Ramazanov M, Tokesheva A, Khairkulova A. On the non-uniqueness of solution to the homogeneous boundary value problem for the heat conduction equation in an angular domain. M [Internet]. 2016 Dec. 30 [cited 2025 Aug. 23];84(4):80-7. Available from: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/128