References
- Anderson J. R. Muir's textbook of pathology, 10th ed. Edward Arnold. 1976; 57
- Bellanti J. A. Immunology, Asian ed. 181. Saunders, Igakushoin 1972
- Koizumi F. Immunopathological studies on human tonsils with approach of experimental focal infection. Jap J Tonsil 1976; 15, in Japanese with English abstract