1. Treatment of irregularities of the permanent or adult teeth;Angel;Dental Cosmos,1860
2. Rapid expansion of the maxillary dental arch and nasal cavity by opening the mid-palatal suture;Haas;Angle Orthod,1961
3. The treatment of maxillary deficiency by opening the midpalatal suture;Haas;Angle Orthod,1965
4. Forces produced by rapid maxillary expansion;Isaacson;Angle orthod,1964
5. Forces produced by rapid maxillary expansion;Isaacson;Angle Orthod,1964