1. Brugere H, Bruñere-Picux J, Villenin P (1985) Rec Med Vet 161:1241–1246
2. Littlefield NA, Sheldon WG, Allen R, Gaylor DW (1990) Food Chem Toxicol 28:157–167. doi: 10.1016/0278-6915(90)90004-7
3. Van KV, Woulters MFA, Van FXRL (1993) WHO food additives series. World Health Organization, Geneva
4. Establishment of Maximum Residue Levels of Veterinary Medical Products in Foodstuffs and Animal Origin, Council Regulation No. 237790 of EEC, European Economic Community, 26 June 1990
5. Pena A, Serrano C, Reu C, Baeta L, Calderon V, Silveira I, Sousa JC, Peixe L (2004) Food Addit Contam 21:749–755. doi: 10.1080/02652030410001712493