1. The impact of periodontal infection on systemic diseases;Amar S;Med Sci Mon,2003
2. Parameter on aggressive periodontitis;J Periodontol,2000
3. Parameter on chronic periodontitis with advanced loss of periodontal support;J Periodontol,2000
4. Parameter on chronic periodontitis with slight to moderate loss of periodontal support;J Periodontol,2000
5. Development of a classification system for periodontal diseases and conditions;Armitage GC;Ann Periodontol,1999