References
- Banatvala J. E., Anderson T. B., Reiss B. R. Parainfluenzal infections in the community. British Medical Journal 1961; i: 537–540
- Kaplan E. L. The group A streptococcal upper respiratory tract carrier state: an enigma. Journal of Paediatrics 1980; 97: 337–345
- Lancefield R. C. A serological differentiation of human and other groups of hemolytic streptococci. Journal of Experimental Medicine 1933; 57: 571–595
- Mandell G. L., Douglas R. G., Bennett J. E. Principles and Practice of Infectious Diseases Third edition. Churchill Livingstone, New York 1990; 1519–1524
- Sweet R., Gibbs R. Clinical microbiology of the female genital tract. Infectious Diseases of the Female Genital Tract, Second edition. Williams and Wilkins, Baltimore 1990