B. BEKBOLAT; B. KANGUZHIN; N. TOKMAGAMBETOV. TO THE QUESTION OF A MULTIPOINT MIXED BOUNDARY VALUE PROBLEM FOR A WAVE EQUATION. Известия НАН РК. Серия физико-математическая, [S. l.], n. 4, p. 76–82, 2019. Disponível em: http://89.250.84.46/physics-mathematics/article/view/1678. Acesso em: 23 дек. 2024.