Boyarchuk, V., S. Korobka, M. Babych, and R. Krygul. “Results of Research into Efficiency of a Flat Solar Air Heliocollector With a Wavy Absorbing Surface”. Eastern-European Journal of Enterprise Technologies, vol. 1, no. 8 (97), Jan. 2019, pp. 24-36, doi:10.15587/1729-4061.2019.154550.