1. Malposed teeth: their classification, pathology and treatment;Blum;Int J Orthod,1923
2. Displaced and impacted canines;Rohrer;Int J Orthod,1929
3. Clinical observations on the axial inclination of teeth;Dewel;Am J Orthod,1945
4. Impactions and pseudoimpactions;Erikson;Am J Orthod,1938
5. Treatment of impacted canines;Fastlicht;Am J Orthod,1954