1. Nasopalatine cysts
2. Hamilton, W.J., Boyd, J.D., and Mossman, H.W. Human Embryology, 3d ed. Baltimore , Williams & Wilkins Co., 1962 , p. 120.
3. Shafer, W.G., Hine, W.K., Levy, B.M. A Textbook of Oral Pathology, ed. 2. Philadelphia. W. B. Saunders Co., 1963, p. 65.