1. Treatment timing for maxillary expansion;Baccetti;Angle Orthod,2001
2. Bolton standards of dentofacial developmental growth;Broadbent,1975
3. Frontal cephalometrics: practical applications, part I;Ricketts;World J Orthod,2003
4. Transverse dimension and long-term stability;Vanarsdall;Semin Orthod,1999
5. A clinical approach to identify transverse discrepancies;Hayes,2003