1. The decline of the gastropod Nucella lapillus around south-west England: evidence for the effect of tributyltin from antifouling paints;Bryan;J Mar Biol Assoc UK,1986
2. Campbell WC. Ivermectin and abamectin. Berlin: Springer Verlag, 1989.
3. CBS. De landbouwtelling 1996 (in Dutch). Centraal Bureau voor de Statistiek. Misset uitgeverij B.V., Doetinchem, 1996.
4. ECB. EUSES, the European Union System for the evaluation of substances. National Institute of Public Health and the Environment (RIVM), The Netherlands. Available from European Chemicals Bureau (ECB/DGXI), Ispra, Italy, 1996a.
5. ECB. Technical Guidance Document in support of the commission directive 93/67/EEC on risk assessment for new notified substances and the commission regulation (EC) 1488/94 on risk assessment for existing substances. Ispra, Italy: European Chemical Bureau, 1996b.