1. Collins, C.H., Lyne, P.M. and Grange, J.M. (1995) Microbiological Methods, pp. 394–395, Butterworth-Heinemann Ltd., Oxford.
2. Baron, S. (1991) Medical Microbiology, pp. 254, 255, 262, Churchill Livingstone, New York.
3. Claus, D. and Berkeley, R.C.W. (1984) Genus Bacillus in Bergey’s Manual of Determinative Bacteriology. Vol. 1 (Krieg N.R, Holt J.G., eds) pp. 1105–1139, Williams and Wilkins Co, Baltimore.
4. Leifert, C, Camotta, H, Wright, S.M, Waites, B, Cheyne, V.A. and Waites, W.M. (1991) J. Appl. Bacteriol. 71, 307–330.
5. Leifert, C, Camotta, H. and Waites, W.M. (1992) Plant Cell Tissue Org. Cult. 29, 153–160.