1) Bcbhn, A.: Prosthetic problems in the treatment of jaw clefts. Trans Europ. Orth. Soc., 43: 399-409, 1967.
2) Ramstad, T.: Post-orthodontic retention and post-prosthodontic occlusion in adult complete unilateral and bilateral cleft subjects. C left Palate J., 10(1): 34-50, 1973.
3) Beumer, J., Curtis, T. A., and Firtell, D. N., Maxillofacial rehabilitation: Prosthodontic a nd surgical considerations. chapter 7, 292-310, T h e C. V. Mosby Company, Saint Louis, 1979.