Trofimenko, M.Y., Aslanov, S.K., Dragan, G.S. and Smolyar, V.P. 2020. Gas Flame Structure and Optical Assessment of the Flame Speed and Combustion Efficiency. Ukrainian Journal of Physics. 65, 6 (Jun. 2020), 461. DOI:https://doi.org/10.15407/ujpe65.6.461.