1. Appleton, J.L.T. Bacterial Infection in Dental Practice, p. 508. 4th ed. Philadelphia : Lea & Febiger, 1950.
2. The role of bacteria in periodontal disease
3. Ricoux, L.M. Septicemies Veineuses Subaigues et Infections de la Region Gingivodentaire, These de Paris no. 54, ed. ViGot Frères, p. 76. Paris: 1937.
4. Hypersensitivity reactions in mucous membranes