Basok, B., B. Davidenko, I. Bozhko, and M. Moroz. “UNSTEADY HEAT TRANSFER IN A HORIZONTAL GROUND HEAT EXCHANGER”. Thermophysics and Thermal Power Engineering, Vol. 40, no. 4, Dec. 2018, pp. 34-40, doi:https://doi.org/10.31472/ihe.4.2018.05.