1. Der europäische Markt für Phytotherapeutica;Grünwald;Pharm Ind,1996
2. Keller, K. 1993, Therapeutic use of herbal drugs and their potential toxicity. Problems and results of the revision of herbal remedies in the EEC, Proceedings of the 3rd International Conference on Pharmacopoeias and Quality Control of Drugs, Rome,
3. Laying down community procedures for the authorization and supervision of medicinal products for human and veterinary use and establishing a European Agency for the Evaluation of Medicinal Products;Council Regulation 2309/93/EEC,1993
4. Keller, K. 1996, Phytotherapy at the European level, Proceedings of the AESGP 32nd Annual Meeting; Future regulation of herbal products in Europe and worldwide, Istanbul
5. Decision of January, 14, 1993. Case C-177/91;European Court of Justice,1993