1. The state of clinical research;Baumrind,1991
2. Headgear versus function regulator in the early treatment of Class II Division 1 malocculsion: A randomized clinical trial;Ghafari;Am J Orthod Dentofacial Orthop,1998
3. Anteroposterior skeletal and dental changes after early Class II treatment with bionators and headgear;Keeling;Am J Orthod Dentofacial Orthop,1998
4. Imprecision in orthodontic diagnosis: Reliability of clinical measures of malocclusion;Keeling;Angle Orthod,1996
5. Timing of Class II treatment: Rationale, method, and early results of an on-going randomized clinical trial;Keeling,1995