1. Methods for performance evaluation of coordinate measuring machines,1990
2. The incongruous hip joint—a casting study;Afoke;Journal of Bone and Joint Surgery, British,1980
3. Incongruent surfaces in the human knee joint;Bullough;Nature,1968
4. The shape of the femoral head and preliminary results of clinical use of non-spherical hip prosthesis;Cathcart;Journal of Bone and Joint Surgery,1972
5. Weight bearing areas in the human hip joint;Greenwald;Journal of Bone and Joint Surgery. British,1972