1. Official Methods of Analysis;AOAC,2012
2. Official Methods and Practices of the AOCS;American Oil Chemists’ Society (AOCS),2013
3. D4239: Standard Test Method for Sulfur in the Analysis Sample of Coal and Coke Using High-temperature Tube Furnace Combustion;ASTM (American Society for Testing and Materials),2011
4. Fat in swine nutrition;Azain,2001
5. Lipids;Belitz,2009