1. Adult dental health survey of the United Kingdom. London: Office of Population Censuses and;Todd, J.E.; Lader, D.;Surveys, Social Division,1988
2. The initiation and progression of periodontal disease;Chapple, I.L.C.,1996
3. Calibration and reliability of the periotron 6000 for individual gingival crevicular fluid samples;Chapple, I.L.C.; Cross, I.A.; Glenwright, H.D.; Matthews, J.B.,1995
4. Gingivitis and oral ulceration in patients with neutrophil destruction;Charon, J.A.; Mergenhagen, S.E.; Gallin, J.I.;J Oral Pathol,1985
5. Acatalasia in two Peruvian siblings;Delgado, W.; Calderon, R.;J Oral Pathol,1979