1. Antibiotic and Chemotherapy;Barber, M.; Garrod, L.P.,1963
2. Breed, R. S., Murray, E. G. D., and Smith, N. R. (1957). In Bergey's Manual of Determinative Bacteriology, 7th ed., p. 365, edited by R. S. Breed et al. William and Wilkins, Baltimore.
3. Cook, G. T. (1948). J. Path. Bact., 60, 171.
4. Manual for the Identification of Medical Bacteria;Cowan, S.T.; Steel, K.J.,1965
5. Edwards, P. R., Fife, M. A., and Ewing, W. H. (1961). Publ. Hlth Lab., 19, 85.