1. -4 Centralbl. f;BRA N, H;Bakt. I. Orig.,1923
2. Centralbl. f;BRAUN H.;Bakt. I. Orig.,1928
3. Jour;COLQUHOUN D. B.;Path. and Bact.,1932
4. DE'RossI GINO 1904 Centralbl. f. Bakt. I 36 685; 37 107.
5. GARDNER A. D. 1929 System of Bacteriology in Relation to Medicine (Med. Res. Council) IV p. 163.