1. Baldensperger J., Guarraia L. and Humphreys W.J., (1974), Arch. Microbiol., 99, 323?329.
2. Erhlich H., in ?Biogeochemistry. Ancient and Modern Environmenty?, by Trudinger P. A., Walter M. R. and Ralph A. J., Austr. Acad. of Sciences (1980), Camberra, 609.
3. Francis A. V. and Dodge C. S. (1988), Applied and Environ. Microbiol., 1009?1014.
4. Gosh J. and Imai K. (1965), J. Ferment. Technol., vol. 63, No 3, 259?262.
5. Groudev S. N. and Groudeva V. I. (1984), XVIII Traditional Scientific Conference on Material Processing (1984), Institute of Mineral Processing and Utilization, Cracow, Poland, November 21?23.