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2. Microbiological goals of periodontal therapy;Teles;Periodontol,2000
3. Spirochetes at the forefront of periodontal infections;Ellen;Periodontol,2000
4. Microbial complexes in subgingival plaque;Socransky;J. Clin. Periodontol.,1998
5. Virulence factors of Treponema denticola;Ishihara;Periodontol,2000