1. Conselho nacional de Política energética – CNPE, resolution N° 6 (09.16.2009). DOU Sect. 1; 2009. p. 16.
2. The analysis of biodiesel for inorganic contaminants, including sulfur, by ICP-OES;Grosser,2009
3. ASTM D 6751: standard specification for biodiesel fuel blend stock (B100) for middle distillate fuels.
4. EN 14214: automotive fuels – fatty acid methyl esters (FAME) for diesel engines – requirements and test methods.
5. Handbook of petroleum analysis;Speight,2001