1. Treatment of irregularity of the permanent or adult teeth;Angell;Dent. Cosmos,1860
2. St. Louis and early orthodontics;Pollock;Am. J. Orthod.,1955
3. Experience on widening the median maxillary suture;Thorne;Trans. Eur. Orthod. Soc.,1956
4. The apical base after rapid spreading of maxillary bones;Gerlach;Trans. Eur. Orthod. Soc.,1956
5. Rapid expansion of the maxillary dental arch and nasal cavity by opening the midpalatal suture;Haas;Angle Orthod.,1961