1. Regulation (EC) No 767/2009 of 13 July 2009 on the placing on the market and use of feed, O.J. L 229, 01.09.2009
2. Moore S, Spackman DH, Stein WH (1958) Anal Chem 30:1185–1190
3. Commission Regulation (EC) No 152/2009 of 27 January 2009 laying down the methods of sampling and analysis for the official control of feed, O.J. L 54, 26.02.2009
4. AOAC Official Method 994.12, Amino Acids in Feeds. Official Methods of Analysis of AOAC Int. 18th Ed, 2005, Rev. 4. 2011, Chapter 4, pp 9–19
5. Jajić I, Kristović S, Glamočić D, Jakšić S, Abramović B (2013) J Serb Chem Soc 78(6):839–850