7Czamecki ST, Nanda RS, Currier GF.Perceptions of a balanced facial profile[J]. Am J Orthod, 1993, 104: 180.
8Farkas LG.Anthropometry of the attractive North American Caucasian face. Anthropometry of the Head and Face(ed 2) [M].New York, NY, Raven Press, 1994: 159.
9Pogrel AM. What are normal esthetic values[J]? J Oral Maxillofac Surg 1991,49: 963-969.
10Ferrario VF, Forzac S, Poggio CE, et al. Facial morphometry of television actresses compared with normal women[J]. J Oral Maxillofac Surg, 1995, 53:1008-1014.