1. Exhaust emissions of diesel, gasoline and natural gas fuelled vehicles;Hupperich,1996
2. Experimental investigation of fuel consumption and exhaust emissions of a 16v pent-roof engine fueled by gasoline and CNG;Catania,2001
3. Methane-hydrogen mixtures as fuels;Karim;Int J Hydrogen Energy,1996
4. Hydrogen as an alternative automotive fuel: 1993 update;Kukkonen,1994
5. The effects of hydrogen addition on natural gas engine operation;Swain,1993