1. BibLEHRADEK J. 1935 Temperature and Living Matter. Berlin Borntraeger.
2. GORTNER R. A. 1929 Outlines of Biochemistry. New York Wiley and Sons.
3. ORLA-JENSEN S. 1919 Lactic Acid Bacteria. Copenhagen Host and Son.
4. RAEN OTTO 1932 Physiology of Bacteria. Philadelphia Blakiston.
5. Jour;RAEN OTTO;General Physiol.,1933