1. Sugiyama H:Clostridium botulinum neurotoxin. Microbiol Rev 44:419?448, 1980
2. Sakaguchi G:Clostridium botulinum toxins. Pharmacol Ther 19:165?194, 1983
3. Simpson LL: The origin, structure, and pharmacological activity of botulinum toxin. Pharmacol Rev 33:155?188, 1981
4. U.S. Public Health Service Publication #999-FP-1;MA Cardella,1964
5. Bowmer EJ: Preparation and assay of the international standards forClostridium botulinum types A, B, C, D and E antitoxins. Bull Wld Hlth Org 29:701?709, 1963