● Farrow JA,Collins MD (1984). DNA base composition, DNA-DNA homology and long-chain fatty acid studies on streptococcus thermophilus and Streptococcus salivarius. J. Gen. Microbiol.130, 357-62. ● Orla-jensen S (1919). The lactic acid bacteria. Edition: , Copenhagen: A.F. Host and Sons Forlag.
