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3. B. S. Patel, R. S. Barot, Karan Shah, Pushpendra Sharma, “Air Powered Engine” National Conference on Recent Trends in Engineering & Technology-B.V.M. Engineering College, V.V.Nagar, Gujarat, India, 13-14 May 2011
4. Bharat Raj Singh and Onkar Singh, “Design Of Compressed Air Powered Motorbike Engine”: A technology to control global warming, if implemented widely”
5. Bharat Raj Singh, Onkar Singh, “Study Of Compressed Air Storage System As Clean Potential-Energy For 21st Century” Global Journal of researches in engineering-Mechanical and mechanics engineering, Volume 12 Issue 1 Version 1.0 January 2012