Koshanov B, Shynybayeva N, Koshanova M, Oralbekova N. ON THE SOLVABILITY OF BOUNDARY VALUE PROBLEMS WITH GENERAL CONDITIONS FOR THE TRIHARMONIC EQUATION IN A BALL. JMMCS [Internet]. 2025 Jun. 22 [cited 2025 Jun. 28];126(2). Available from: https://bm.kaznu.kz/index.php/kaznu/article/view/1681