1. Rodrigues' Formula and the screw matrix;Bisshopp;Journ. Eng. Ind., Trans A.S.M.E.,1969
2. Spinal analysis using a three dimensional radiographic technique;Brown;J. Biomechanics,1976
3. On a set of displacements in space;Bottema;Journ. Eng. Ind., Trans A.S.M.E.,1974
4. Vector and tensor analysis;Brand,1959
5. A general method for the investigation of finite displacements of spatial mecanisms and certain cases of passive joints;Dimentberg;Trudi Sem. Teorii. Mash. Mekh. I Akademiia Nauk SSSR 17-5,1948