1. Treatment of irregularities of the permanent or adult tooth;Angell;Dental Cosmos,1860
2. Surgical-orthodontic expansion of the maxilla;Bell;Am J Orthod,1976
3. Surgical-orthodontic correction of horizontal maxillary deficiency;Bell;J Oral Surg,1979
4. Die Gaumennaht Erweiterung;Derichsweiler;Fortschr Kieferorthop,1953
5. Die Gaumennaht Erweiterung;Derichsweiler,1958