1. International Standard Organization. ISO 8178 Reciprocating internal combustion engines – exhaust emission measurement. Switzerland, 1996.
2. European Commission. Directive 2003/44/EC of the European Parliament and of the Council of 16 June 2003 amending Directive 94/25/EC on the approximation of the laws, regulations and administrative provisions of the Member States relating to recreational craft. Official Journal L 214 26/08/2003 2003, p. 18–35.
3. Alternative diesel fuels from vegetable oils;Ali;Bioresour Technol,1994
4. Fuel properties and emissions of soybean oil esters as diesel fuel;Chang;J Am Oil Chem Soc,1996