References
- Chaconas, S. J. and Caputo, A. A. (1975) Observations of orthopaedic force distribution utilising maxillary orthodontic appliances. Abstracted in Journal of Dental Research, 54, 45.
- Ricketts, R. M. (1973) Features of Bioprogressive Therapy, pp. 33–36, Denver: Rocky Mountain Orthodontic Publications.