1. Biomechanics and mechanics (section IV);Proffit,2000
2. Biomechanical basis of extraction closures;Nanda,1996
3. Different approaches to anchorage: a survey and an evaluation;Melsen;Angle Orthod,1997
4. Clinical versus quantitative assessment of headgear compliance;Cureton;Am J Orthod Dentofacial Orthop,1993
5. Distalization with a Nance appliance and coil springs;Pieringer;J Clin Orthod,1997