Исмайылов, А.Е., Ж. Кожамкулова, and Ж.С Сулейменова. 2020. “DETERMINATION OF DIFFERENT SITUATIONS OF BTP AND IDENTIFICATION OF ADMISSIBLE METHODS OF SOLVABILITY”. Bulletin of Abai KazNPU. Series of Physical and Mathematical Sciences 72 (4). Алматы, Казахстан:41-47. https://doi.org/10.51889/2020-4.1728-7901.06.