Primary sources:
1-"The
bacterial spore: nature's survival package" by Peter Setlow
2-"Basic
laboratory protocols for the presumptive identification of Bacillus
anthracis" - CDC
3-"Production
of anthrax spore vaccine - General laboratory procedures" - www.fao.org
4-"A
Field Investigation of Bacillus anthracis Contamination ..."
- James A. Higgins, et al
5-"Morphology
of the Type Strain of Bacillus anthracis ..." by Eiko Yabuuchi et al
6-"Scientists
discover how anthrax creates its deadly spores" by brightsurf.com
7-"Approved
Tests for the Detection of Bacillus anthracis" - CDC