1. Oral hygiene: a history of tongue scraping and brushing;Christen;JADA,1978
2. Production and origin of oral malodor: a review of mechanisms and methods of analysis;Tonzetich;J Periodontol,1977
3. Offensive breath: its causes and prevention;Prinz;Dent Cosmos,1930
4. Reduction of malodor by oral cleansing procedures;Tonzetich;Oral Surg Oral Med Oral Pathol,1976
5. Effects of daily mechanical tongue cleaning of the rat on dental plaque and tongue mucosa;Vasilakis;Clin Prevent Dent,1981