1. Paradental pyorrhoe und Alveolaratrophie;Gottlieb;Fortschr. d. Zahnheilk.,1929
2. Periodontia;Willman,1938
3. Clinical Pathology and Treatment of Dental Pulp and Periodontal Tissues;Coolidge,1939
4. Special Dental Pathology;Black,1915
5. A Textbook of Dental Histology and Embryology;Noyes,1912