1. Leukoplakia oris–a clinical study;Prim;Dent Cosmos,1928
2. Oral cancer and precancer;Pindborg,1980
3. Oral leukoplakia;Banoczy,1982
4. Epidemiology;Bouquot,1987
5. Leukoplakia, lichen planus and other oral keratoses in 23,616 white Americans over the age of 35 years;Bouquot;Oral Surg Oral Med Oral Pathol,1986