1. Dentists Desk Reference: Materials Instruments and Equipment;American Dental Association,1983
2. Etiology and pathogenesis of traumatic dental injuries. A Clinical study of 1,298 cases;Andreasen;Scand J Dent Res,1970
3. Epidemiology of traumatic dental injuries to primary and permanent teeth in a Danish population sample;Andreasen;Int J Oral Maxillofac Surg,1972
4. Crown fractures;Andreasen,1981
5. Crown-Root Fractures;Andreasen,1981