[1]
A. Tanik and M. Gül, “The validity of the Community Periodontal Index of Treatment Needs (CPITN) in epidemiological studies of periodontal diseases”, Int Dent Res, vol. 10, no. 2, pp. 44–48, Aug. 2020, doi: 10.5577/intdentres.2020.vol10.no2.3.