6Sorokulova I B, Reva O N, Smirnov V V, et al. Genetic diversity and involvement in bread spoilage of Bacillus strains isolated from flour and ropy bread [J].Letters in Applied Microbiology. 2003,37 : 169 - 173.
7Kirschner L M, Von Holy. Rope spoilage of bread [J].South African Journal of Science, 1989,85:425 - 427.
8Schoeni J I., Wong A C. Bacillus cereus food poisoningand its toxins [J]. Food Protect,2005,68(3) :636- 648.