1. M. Amsterdam, M.H. Goldman, and D.W. Cohen (1973 ) In: Periodontal Prosthesis in Periodontal Therapy (), 5th edn , p.977 . C.V. Mosby Company, St Louis.
2. Establishing centric relation and vertical dimension in occlusal rehabilitation
3. M.H. Goldman, D.W. Cohen, P.M Ruben, M.H. Goldman, and D.W Cohen . (1973 ) Treatment Planning in Periodontal Therapy (), 5th edn , p.354 . C.V. Mosby Company, St Louis.