1. Die Verschiebungsbahn des unterkiefers am schadel;Spee,1890
2. Treatment planning for dentofacial deformities;Proffit,1980
3. Diagnosis and treatment planning in orthodontics;Proffit,1986
4. Leveling the curve of spee: its effect on mandibular arch length;Baldrige;J Pract Orthodont,1969
5. Leveling the curve of spee: a new prediction formula;Garcia;J Tweed Found,1985