Hashchuk, P., and S. Nikipchuk. 2020. “Perspectives of Application of Rapid Internal Combustion Engine in Drive of Mobile Technique: 1. The Efficiency of Energy Sources for a Heat-Engine”. Mechanics and Advanced Technologies, no. 1(88) (April). Kyiv, Ukraine:82-92. https://doi.org/10.20535/2521-1943.2020.88.201396.