1. Third molars in relation to malocclusion;Dewey;Int J Orthod,1917
2. Responsibility of the third molar for secondary crowding;Bergstrom;Dent Abstr,1961
3. Third molar teeth and their effect upon the lower anterior teeth: a survey of forty-nine orthodontic cases five years after band removal;Sheneman;[Master's Thesis], St. Louis, Missouri, St. Louis University,1968
4. Transactions of Third International Orthodont Congress;Schwartz,1975
5. Extraction of third molars in cases of anticipated crowding in the lower jaw;Lindquist;Am J Orthod,1982