1Simon P. Fundamental principles of a systematic diagnosis of dentalanomalies. Boston, the seratford Co. 1926 in: Peck. H. et: A concept of facial esthetics[J]. Angle Orthod, 1971,40(4): 284 - 318.
2Ricketts RM. Esthetics, enviroment, and the law of lip relation[J]. Am J Orthod, 1968,54(4) :272 - 289.
3Holdaway RA. A soft - tissue cepholometric analysis and its use in orthodontictreatment planning. part Ⅰ[J]. Am J Orthod, 1983,84(1): 1- 28.
4Burstone CJ. Lip posture and its significance in treatment planning[J].Am J Orthod, 1967,53(4) :262 - 274.
5Mew J. Suggestions for forecasting and monitoring facial growth [ J ]. Am J Orthod Dentofac Orthop , 1993,104(2): 105 - 120.
6Ismail SFH. Three - dimensional assessment of the effects of extraction andnonextraction orthodontic treatment on the face[J]. Am J Orthod Dentofacial Orthop, 2002,121 (3): 244 - 256.
8Pork MS. Soft tissue profile: A survey of Arican - American preference.[J]. Am J Orthod Dentofac Orthop, 1995,108 (2): 90 - 103.
9Hwang HS, Kim WS ,Mcnamara JA. Ethic differences in the soft tissueprofile of korean and European - American adults with nomal occlusionsand wellbalanced faces[ J ]. Angle Orthod, 2002,72 ( 1 ): 72 -80.
10Lundstrom A, Cooke MS. Proportional analysis of the facial profile in natualhead position in caucasion and chinese children [ J ]. Br J Orthod, 1991,18(1):43-49.
