Ambarev, Krasimir, and Valyo Nikolov. 2024. “EXPERIMENTAL STUDY OF TOXIC COMPONENTS IN THE EXHAUST GASES DURING THE OPERATION OF A CAR ENGINE WITH GASOLINE AND LPG”. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (January): 20-23. https://doi.org/10.17770/etr2023vol3.7304.