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2. Use of crude filtered vegetable oil as a fuel in diesel engines state of the art: Literature review
3. Tyson, K. S.; McCormick, R. L.Biodiesel Handling and Use Guidelines; Report No. NREL/TP-540-43672;National Renewable Energy Laboratory:Golden, CO, 2006.
4. Van Gerpen, J.; Shanks, B.; Pruszko, R.; Clements, D.; Knothe, G.Biodiesel Production Technology; Report No. NREL/SR-510-36244;National Renewable Energy Laboratory:Golden, CO, 2004.
5. Automotive Fuels, Diesel, Requirements and Test Methods; BS EN 590:2009+A1:2010;British Standards Institute:London, U.K., 2010.