Берикханова , Г., Жолымбаев , О. and Анияров A. 2023. SOME PHYSICAL PROBLEMS THAT LEAD TO THE BESSEL EQUATION. Bulletin of Abai KazNPU. Series of Physical and mathematical sciences. 82, 2 (Jun. 2023), 90–99. DOI:https://doi.org/10.51889/2959-5894.2023.82.2.010.