1. Council Regulation No. 2821/98 amending, as regards withdrawal of the authorisation of certain antibiotics, Directive 70/524/EEC concerning additives in feedingstuffs, Official J. Euro. Commun. L 351 (1998) 4–8.
2. Commission Regulation (EC) No. 1831/2003, Official J. Euro. Commun. L 268 (2003) 29–43.
3. Community Register of Feed Additives pursuant to Regulation (EC) No. 1831/2003, Appendices 3 & 4. Annex: List of additives. Available from: http://ec.europa.eu/comm/food/food/animalnutrition/feedadditives/registeradditives_en.htm.
4. Thin-Layer Chromatographic Determination of Monensin in Feeds: Screening Method
5. A New Improved High Performance Thin Layer Chromatography (HPTLC) Method for the Detection of Ionophore Antibiotics in Feeds and Animal Tissues