1. The tongue and dental function;Baker;Am. J. Orthodontics,1954
2. The significance of soft tissue morphology in diagnosis and treatment planning;Ballard;Tr. European Orthodont. Soc.,1953
3. The aetiology of irregularity and malocclusion of the teeth;Brash,1956
4. Thoughts on the aetiology of malocclusion;Brodie;Tr. European Orthodont. Soc.,1957
5. Orthodontics, Principles and Practice;Graber,1966