1. Anterior and Posterior Cross-bites;Wood;J. Dent. Children,1962
2. Development of deciduous and mixed dentition;Clinch;D. Practitioner,1966
3. Crossbite-Mandibular malposition;Higley;J. Dent. Children,1968
4. Rapid expansion of maxillary dental arch and nasal cavity by opening the midpalatal suture;Haas;Angle Orthodontics,1961