1. Hoffer M, Grunberg E (1974) J Med Chem 17:1019
2. Fontaine M, Cadoré JL (1995) Vademecum du Vétérinaire. Editions Vigot, Paris
3. Voogd IE (1981) Mutat Res 86:247
4. Papakostantinou SS Garoufalias, Todoulou OG, Filippatos EC, Papadaki Valiraki AE, Chytiroglou A Lada (1998) Arznein Forsch Drug Res 48:75
5. Council Regulation (EECC) No. 2377/90 (1990) Off J Eur Commun L224/1