References
- Berman, M. (1976) Directional forces, British Journal of Orthodontics, 3, 131–137.
- Creekmore, T. D. (1975) Physiologic drift, Journal of Clinical Orthodontics, 9, 495–510.
- Hickham, J. H. (1974) Directional edgewise orthodontic approach, Journal of Clinical Orthodontics, 8, 617–633.
- Joondeph, D. R. and McNeill, R. W. (1971) Congenitally absent second premolars: an interceptive approach, American Journal of Orthodontics, 59, 50–66.
- Joondeph, D. R. and Reidel, A. R. (1976) Second premolar serial extractions, American Journal of Orthodontics, 69, 169–184.
- Schudy, F. F. (1975) J. C. O. Interviews, Journal of Clinical Orthodontics, 9, 495–510.
- Weber, A. D. (1969) A longitudinal analysis of premolar enucleations, American Journal of Orthodontics, 56, 394–402.
- Wisth, P. J., Thunold, K. and Böe, O. E. (1974) Frequency of hypodontia in relation to tooth size and dental arch width, Acta Odontologica Scandinavica, 32, 201–206.