1) Loe, H., Theilade, E. and Jensen, S. B.: Experimental gingivitis in man. J. periodontol., 36: 177-187, 1
2) Saxe, S. R., Greene, J. C., Bohannan, H. M. and Vermillion, J. R.: Oral debris, calculus and periodontal disease in the Beagle dog. Periodontics, 5: 217-225, 1967.
3) Axelesson, P. and Lindhe, J.: Effect of controlled oral hygiene procedures on caries and periodontal disease in adults. Results after 6 years. J. Clin. Periodontol., 8: 239-248, 1981.
4) Lindhe, J. and Axelesson, P.: The effect of controlled oral hygiene and topical fluoride application on caries and gingivitis in Swedish schoolchildren. Community Dentistry and Oral Epidemiology, 1: 9-16, 1973.
5) Courant, P. R., Paunio, I. and Gibbons, R. J.: Infectivity and hyaluronidase activity of debris from healthy and diseased gingiva. Archs. Oral Biol., 10: 119-125, 1965.