1. Movements of the soft palate;Calnan;Brit. J. plast. Surg.,1953
2. Investigation of children with speech defect, with particular reference to nasality;Calnan;Brit. med. J.,1958
3. Über die angelborene Insufficienz des Gaumensegels;Gutzmann;Berl. klin. Wschr.,1899
4. Congenital insufficiency of the palate;Kelly;J. Laryngol,1910
5. L'insuffisance velo-palatine;Lermoyez;Ann. Mal. Oreil Larynx,1892