1. and 1957. Bergey's Manual of determinative bacteriology, 7th ed., Baltimore, pp. 503-505.
2. and 1937. Dictionnaire des bactéries pathogènes, Paris, p. 271.
3. 1955. In Medical and public health laboratory methods, ed. by J. S. Simmons and C. J. Gentzkow, Philadelphia, p. 620.