1. Open bite;Hellman;Int J Orthod,1931
2. The frequency of orthodontic anomalies at various ages;Korkhaus;Int J Orthod,1928
3. Open-bite;Worms;Am J Orthod,1971
4. The interception of the open bite in the early growth period;Parker;Angle Orthod,1971
5. Thumb-sucking: Classification and treatment;Johnson;J Dent Child,1993