1. Finegold S. M. and E. J. Baron. 1986. Bailey and Scott's diagnostic microbiology 7th ed. p. 594-631. C. V. Mosby Co. St. Louis.
2. Finegold S. M. and E. J. Baron. 1986. Bailey and Scott's diagnostic microbiology 7th ed. p. 481-499. C. V. Mosby Co. St. Louis.
3. Nocardiosis. A review of 25 cases occurring during 24 months;Frazier A. R.;Mayo Clin. Proc.,1975
4. Gordon M. A. 1985. Aerobic pathogenic Actinomycetaceae p. 249-262. In E. H. Lennette A. Balows W. J. Hausler Jr. and H. J. Shadomy (ed.) Manual of clinical microbiology 4th ed. American Society for Microbiology Washington D.C.
5. Sputum digestion. The mortality rate of tubercle bacilli in various digestion systems;Krasnow I.;Am. J. Clin. Pathol.,1966