1. Buchheim R., 1854. Lehrbuch der Arzneimittellehre. L. Voß Verlag, Leipzig.
2. The register of toxicologists. Hum;Fowler;Exper. Toxicol.,1994
3. EUROTOX registered toxicologist;Fowler;EUROTOX Newslett.,1995
4. EUROTOX registered toxicologist;Fowler;EUROTOX Newslett.,1995
5. The German toxicological curriculum: establishing a postgraduate training program for experts in toxicology;Hesse-Callaway;Reg. Toxicol. Pharmacol.,1996