Navrodskaya, R., N. Fialko, G. Gnedash, and G. Sbrodova. “ENERGY-EFFICIENT HEAT RECOVERY SYSTEM FOR HEATING THE BACKWARD HEATING SYSTEM WATER AND BLAST AIR OF MUNICIPAL BOILERS”. Thermophysics and Thermal Power Engineering, Vol. 39, no. 4, Sept. 2017, pp. 69-75, doi:https://doi.org/10.31472/ihe.4.2017.10.