1. 1) Coslet JG and Cohen DW. Observations on the development of the vestibular trough in the human fetus. Part I. The anterior portion of the mouth. J Periodont 1969; 40:320-329.
2. 2) Kitamura H. Early development of teeth. In: Embryology of the mouth and related structures. Tokyo, Maruzen, 1989; 1-34.
3. 3) Bhussry BR. Development and growth of teeth. In: Bhaskar SN, ed, Orban's Oral histology and embryology 11th ed. St. Louis, Mosby, 1990; 28-48.
4. 4) Ten Cate AR, et aL Development of the tooth and its supporting tissues. In: Nanci A, ed, Oral Histology — Development, Structure, and Function. 6th ed. St. Louis, Mosby, 2003; 79-110.
5. 5) Kollar EJ and Baird GR. Tissue interactions in embryonic mouse tooth germs. II. The inductive role of the dental papilla. J Embryol exp Morph 1970; 24:173-186.