1. BAYLISS W. M.: Principles of General Physiology 1924 p. 217.
2. Jahrb. f. wissenschaftl;BENECKE W.;Botanik,1895
3. BESANCON , PHILBERT AND BOUDIN: Bull. Institut Pasteur , 1913 , 11 , 578 .
4. BOI ssE VAIN , C. H. : Jour. Infect. Diseases , 1928 , 43 , 194 .
5. Bakteriol., I Abt;CACHE A.;Orig.,1906