References
- Björk, A. and Skieller, V. (1977) Growth of the maxilla in three dimensions as revealed radio-graphically by the implant method, British Journal of Orthodontics, 4, 53–64.
- De Coster, L. (1952) The familial line, studied by a new line of reference, Transactions of the European Orthodontic Society, 50–55.
- Houston, W. J. B. and Lee, R. T. (1985) Accuracy of various methods of radiographic superimposition on cranial base structures, European Journal of Orthodontics, 7, 127–135.