1. Annual Report of the Working Party of Pesticide Register, London, 1996.
2. A. Anderson, A. Jansson, H. Palsheden, T. Bergh, presented at the 1st European Pesticide Residue Workshop, Alkmaar, The Netherlands, 1996.
3. J.D. Klaveren, presented at the 1st European Pesticide Residue Workshop, Alkmaar, The Netherlands, 1996.
4. M. Gamon, Plan Nacional de Vigilancia de Residuos de Plaguicidas, Diseño y Metodologı́a, IV Semana Internacional sobre Residuos de Plaguicidas, Almerı́a, Spain, 1996.
5. Royal Order 280/1994, 18th February; Annex of Official Spanish Bulletin No. 58, Official Spanish Bulletin Bureau, Madrid, 9 March 1996.