1. Bryant M. P. and Burkey L. A., 1956, J. Bacetriol., 71: 43-46.2.Bergeres J. L. and Sivela S., 1989, Detection and enumeration of Clostridial spores related to cheese quality-Classical andnew methods, FIL-IDF Bull. 51:18-23.3.Touraille C. and Bergere J. L., 1974, Biochimie, 56: 404-422.4.Vissers M. M. M., Drichuis F., Giffel T., John P. D., Lankveld J. M. G., 2007, J. Dairy Sci., 90:928