1. Leukoplakia buccalis;Schwimmer;Vierteljahrsschr Derm Syph,1877
2. Leukoplakia;Goodale;Ann Otol Rhinol Laryngol,1900
3. Leukoplakia oris;Hobeak;Acta Odontol Scand,1946
4. A textbook of oral pathology;Shafer,1983
5. Clinical and histopathological aspects of premalignant lesions;Bánóczy,1984