1. Pediatrics;Rudolph,1977
2. Functional anatomy of the eustachian tube;Simkins;Arch. Otolaryngol,1943
3. Rapid expansion of the maxillary dental arch and nasal cavity by opening the mid-palatal suture;Haas;Angle Orthod.,1961
4. Palatal expansion: Just the beginning of dentofacial orthopedics;Haas;Am. J. Orthod.,1970