1. Expansion of the midpalatal suture studied by means of metallic implants;Krebs;Eur Orthod Soc Rep,1958
2. Rapid expansion on the maxillary dental arch and nasal cavity by opening the midpalatal suture;Haas;Angle Orthod,1961
3. The treatment of maxillary deficiency by opening the midpalatal suture;Haas;Angle Orthod,1965
4. Changes in nasal airflow incident to rapid maxillary expansion;Wertz;Angle Orthod,1968
5. Anatomical changes induced by splitting of the midpalatal suture;Davis;Angle Orthod,1969