Amanzholov, T., E. Belyayev, M. Mohanraj, and A. Toleukhanov. “STUDY OF BOREHOLE HEAT EXCHANGER HEAT TRANSFER ENHANCEMENT PARAMETERS”. Journal of Mathematics, Mechanics and Computer Science, vol. 115, no. 3, Sept. 2022, pp. 65-77, doi:10.26577/JMMCS.2022.v115.i3.07.