1. Orthodontic treatment for posterior crossbites;Harrison;Cochrane Database Syst Rev,2002
2. Nasal cavity changes and the respiratory standard after maxillary expansion;Ramires;Braz J Otorhinolaryngol,2008
3. Transverse maxillary deformities: diagnosis and treatment;Will;Oral Maxillofac Surg,1996
4. Treatment timing for rapid maxillary expansion;Baccetti;Angle Orthod,2001
5. A systematic review concerning early orthodontic treatment of unilateral posterior crossbite;Petrén;Angle Orthod,2003