Fialko, N. M., G. A. Presich, G. A. Gnedash, S. I. Shevchuk, and I. L. Dashkovska. “INCREASE THE EFFICIENCY OF COMPLEX HEAT-RECOVERY SYSTEMS FOR HEATING AND HUMIDIFYING OF BLOWN AIR OF GAS-FIRED BOILERS”. Thermophysics and Thermal Power Engineering, Vol. 40, no. 3, Sept. 2018, pp. 38-45, doi:https://doi.org/10.31472/ihe.3.2018.06.