Khajiev I.O, Mamatqulova M.Sh, Komiljonova G.A. Conditional Correctness of the Initial-Boundary Value Problem for The System of Second Order Mixed Type Equations. zr [Internet]. 2023 Apr. 18 [cited 2025 Apr. 7];17:47-5. Available from: https://zetarepo.com/index.php/zr/article/view/1881