1. R.H. Brownlee and R.H. Uhlinger, Process of Making Carbon Monoxid and Hydrogen, US Patent No. 1,107,582, 1914.
2. Eastman D.B., Barber E.M., Reynolds B. Process for the manufacture of synthesis gas. The Texas Company; US Patent No. 2,591,687, 1952.
3. Herstellung von Synthesegas im Otto-Motor bei gleichzeitiger Arbeitsgewinnung;Szeszich;World Power Conf,1956
4. Production of Synthesis Gas by an Internal Combustion Engine;Yamamoto;Proc Sixth World Petroleum Congress,1963
5. Examination of Rich Mixture Operation of a Dual Fuel Engine;Karim;SAE Technical Paper,1990