1. Study of hydrogen gaseous fuel influence on the thermal condition of a diesel engine
2. K. Ambarev, V. Nikolov and A. Ivanov, System for experimental study of diesel engine at work with Brownian gas (Mechanic of the Machines, Vol. 115, ISSN 0861-9727, Varna, 2016), pp. 20–23.
3. A. Tashev and E. Dimitrov, An experimental results of compression ignition engines operating in dual-fuel mode (Scientific Conference on Aeronautics, Automotive and Railway Engineering and Technologies, BulTrans-2016, 2016), pp. 75–80.
4. Combustion and emission characteristics of a natural gas-fueled diesel engine with EGR
5. An experimental investigation on performance and emissions of a single cylinder dual fuel Diesel-CNG engine combined with EGR