1. Beijerinck, M. W. 1893. Ueber Atmungsfiguren beweglicher Bakterien. Centr. Bakteriol. Parasitenk. Abt. I. Orig.14 827–845.
2. Canale-Parola, E. andKupfer, D. G. 1965. Isolation of thin spirilla. Bacteriol. Proc.1965 p. 22.
3. Cayton, H. R. andPreston, N. W. 1955.Spirillum mancuniense n. sp. J. Gen. Microbiol.12 519–525.
4. Christiansen, A. H. 1964. Morphology of the colonies ofT. Reiter andT. Kazan grown in a solid medium. Acta Pathol. Microbiol. Scand.60 234–240.
5. Conn, H. J., Bartholomew, J. W. andJennison, M. W. 1957. Staining methods, p. 13.In S. A. B. Manual of microbiological methods, McGraw-Hill, New York.