1. Diamond, M. Dental Anatomy. New York, MacMillan Co., 1952, p. 46.
2. Kronfeld, R. Histopathology of the Teeth. Philadelphia, Lea and Febiger, 1939, p. 67-85.
3. Bodecker, C.F. Fundamentals of Dental Histology and Embryology , New York, MacMillan Co., 1926, p. 94-97.
4. Sicher, H. Orban's Oral Histology and Embryology, ed. 5. St. Louis, C. V. Mosby Co., 1962 , p. 121-27; 139-40.
5. Influence of Occlusal Wear and Age on Formation of Dentin and Size of Pulp Chamber