Mockus, Saulius, Jonas Sapragonas, Agnius Stonys, and Saugirdas Pukalskas. 2006. “Analysis of Exhaust Gas Composition of Internal Combustion Engines Using Liquefied Petroleum Gas”. Journal of Environmental Engineering and Landscape Management 14 (1):16-22. https://doi.org/10.3846/16486897.2006.9636874.