1. Authority of Po river basin, 1996. Deliberazione n. 12/96. Direttiva per il contenimento dell’inquinamento provocato dagli allevamenti zootecnici. Notiziario dell’Autorità di bacino del fiume Po, Anno IV, n. 11–12
2. Effects of the antibiotics oxytetracycline and tylosin on soil fauna;Baguer;Chemosphere,2000
3. Residues of oxytetracycline and its 4′-epimer in edible tissues from turkeys;Capolongo;Journal of AOAC International,2002
4. CVMP, 1997. Tylosin Summary Report EMEA MRL/205/97-Final. Available from
5. CVMP/VICH/52/98, 1998. VICH Topic GL6 (Ecotoxicity Phase I) Step 7 Guideline on Environmental Impact Assessment (EIAS) for Veterinary Medicinal Products––Phase I