1. G. Merker, C. Schwarz, G. Stiesch and F. Otto, Simulating Combustion (Springer-Verlag, 2006), pp. 83–86 and pp. 149–150.
2. J. Heywood, Internal Combustion Engine Fundamentals (McGraw-Hill, 1988), pp. 507–517.
3. P. Dimitrov, Internal Combustion Engines – Part I, (Technical University - Sofia, 2000), pp. 94–97, (In Bulgarian).
4. On Combustion of Diesel Fuel Drops at LPG Fuelling by Diesel Gas Method
5. Efficient and Ecological Indicators of CI Engine Fuelled with Different Diesel and LPG Mixtures