Tashev, Atanasi, and Evgeni Dimitrov. “INVESTIGATION OF THE IMPACT OF COMPRESSED NATURAL GAS ON HEAT RELEASE RATE IN DUAL-FUEL OPERATION OF A D3900 DIESEL ENGINE AT MID LOADS”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 22, 2024): 368–372. Accessed December 19, 2024. https://journals.rta.lv/index.php/ETR/article/view/7946.