1. Determination of dexamethasone in urine and faeces of treated cattle with negative chemical ionization–mass spectrometry
2. G. Brambilla, Instituto Superiore di Sanita, Roma, personal communication.
3. EEC Council Regulation 508/99/CEE, Off. J. Eur. Commission, L60 of 9-3-1999.
4. EEC Council Regulation 2593/99/CEE, Off. J. Eur. Commission, L315 of 9-12-1999.
5. EEC Council Regulation 2535/00/CEE, Off. J. Eur. Commission, L291 of 18-11-2000.