1) Cercek, J. F., Kiger, R. D., Garrett, S. and Egelberg, J.: Relative effects of plaque control and instrumentation on the clinical parameters of human periodontal disease. J. Clin. Periodontol., 10: 45-56, 1983.
2) Axelsson, P. and Lindhe, J.: Effect of controlled oral hygiene procedures on caries and periodontal disease in adults. J. Clin. Periodontol., 5: 133-151, 1978.
3) Hughes, T. P. and Caffesse, R. G.: Gingival changes following scaling, root planing and oral hygiene. J. Periodontol., 49: 245-252, 1978
4) Morrison, E. C., Ramfjord, S. P. and Hill, R. W.: Short-term effects of initial, nonsurgical periodontal treatment (hyienic phase). J. Clin. Periodontol., 7: 199-211, 1980
