1. Provenza, D.V.: Fundamentals of Oral Histology and Embryology, Philadelphia : J. B. Lippincott Co., 1972, p 124.
2. Sicher, H., and Bhaskar, S.N. (eds) : Or-ban's Oral Histology and Embryology, St. Louis: C. V. Mosby Co., 1972 , p 62.
3. Frank, R.M., and Nalbandian, J.: Ultrastructure of Amelogenesis, in Miles, A.E.W. (ed) : Structural and Chemical Organization of Teeth, Vol 1, New York: Academic Press , 1967, p 449.
4. Takuma, S.: Ultrastructure of Dentinogenesis, in Miles, A.E.W. (ed) : Structural and Chemical Organization of Teeth, Vol 1, New York: Academic Press , 1967, p 340.
5. Electron microscopy of resorbing surfaces of dental hard tissues