1. Periodontia;Goldman,1949
2. Handbuch der Gewebelehre des Menschen;Koelliker,1902
3. Parodontal diesease;Fish,1944
4. Tissue changes, particularly of the bone, incident to tooth movement;Oppenheim;Am Orthodont,1911
5. The microscopic and general anatomy of the teeth;Mummery,1924