Mockus, S., Sapragonas, J., Stonys, A. and Pukalskas, S. 2006. Analysis of exhaust gas composition of internal combustion engines using liquefied petroleum gas. Journal of Environmental Engineering and Landscape Management. 14, 1 (Mar. 2006), 16-22. DOI:https://doi.org/10.3846/16486897.2006.9636874.