6Witzig JW. The cliniel management of basic maxillofacial facial Orthopedic appliances. Vol. 2 Diagnosis Boston PSG Pwblishmg 1987,221. 被引量:1
7Ai- Lian Chna. The Effects of extraction Versus nonextraction orthodontic treatment on the growth of the lower anterior face height. Am J Orthod Dentofae Orthop 1993,104:361. 被引量:1