1. Sita Rama Raju AV. Experimental investigations on the performance of a lean burn spark ignited gas engine. PhD thesis I.C.engines lab, IIT Madras, Chennai, India; 2001.
2. Use of hydrogen to enhance the performance of a vegetable oil fuelled compression ignition engine;Senthil;Int J Hydrogen Energy,2000
3. Prakash G. Investigations on a biogas diesel dual fuel engine. M.S thesis I.C.engines lab, IIT Madras, Chennai, India; 2001.
4. Narayana Reddy J, Ramesh A. Experimental studies on a straight vegetable oil-biogas dual fuel engine. Fourth International symposium on fuels and lubricants, Delhi, India, SAE Paper No. 2004; 146.
5. Assessment of simulated biogas as a fuel for the spark ignition engine;Jingdang;Fuel,1998