1. British Standard BS6808 Co-ordinate measuring machines. Part 2: 1987 Method for verifying performance, British Standards Institute 1987.
2. ANSI/ASME B89.1.12M-1985,Methods for performance evaluation of coordinate measuring machines. ASME 1985.
3. VDI/VDE 2617Accuracy of co-ordinate measuring machines. Parts 1, 2.1 and 3, VDI/VDE 1983.
4. AFNOR E11-150 Co-ordinate measuring machines, 1986.
5. Harrison, P.W. and Penfold, A.B., 1981. Monitoring the performance of 3D measuring machines, Meas. and Insp. Technol., 37-42.