1. Cranial base development;Björk;Am. J. Orthod.,1955
2. Die Fernröntgenaufnahme;De Coster,1956
3. The human face;Enlow,1968
4. The neurocranial basis for facial form and pattern;Enlow;Angle Orthod.,1973
5. The value of the PM reference line for estimating natural head position;Feuer;Angle Orthod.,1974