References
- Houston, W. J. B. and Waters, N. W. (1976) The design of buccal canine retraction springs for removable orthodontic appliances British Journal of Orthodontics, 4, 191–195.
- Waters, N. W. (1982) The mechanics of buccal canine retraction springs for removable orthodontic appliances, British Journal of Orthodontics, 9, 164–172.