1. U. Schwabe, D. Paffrath, Arzneiverordnungsreport '96 Aktuelle Daten, Kosten, Trends und Kommentare, Gustav Fischer Verlag, Stuttgart, 1999.
2. A. Wenzel, Ch. Schäfers, A Schmitz, V. Vollmer, Research efforts towards the development and validation of a test method for the identification of endocrine disrupting chemicals, Second Progress Report, EC Contract, B6-7920/98/000015, 2000.
3. The fate of pharmaceutical chemicals in the aquatic environment
4. Behaviour and occurrence of estrogens in municipal sewage treatment plants — II. Aerobic batch experiments with activated sludge
5. High resolution gas chromatography determination of twelve acidic non-steroidal antiinflammatory drugs (NSAIDs) as methyl ester derivatives in plasma