1. The complete periodontal examination
2. Predictive value of clinical and microbiological parameters for the treatment outcome of scaling and root planing
3. Charon J., Mouton Ch. (2003) Parodonthie Medicale, Edition CdP, Groupe Liaisons, Paris, p. 421.
4. Djemileva-Konova T. (1976) Clinical and Experimental Data about the Influence of the Dental Plaque on the Gingiva, Dissertation, Medical University of Sofia, Sofia, p. 319.
5. Djemileva-Konova T. (1999) Periodontal Diseases, Atser, Sofia, p. 367. (In Bulgarian)