1. NAS 979. National Aerospace Standards 979
2. Accuracy of machine tools and methods of test. Part 30. Specification for machining centers and computer numerically controlled milling machines, horizontal and vertical spindle types;British Standards Institution,1992
3. Acceptance code for machine tools-Part 4: Determination of circular hysteresis, circular and radial deviation of circular movements of numerically controlled machine tools;ISO 230-4,1994
4. A simple method for testing measuring machines and machine tools;Bryan;Prec Eng,1982
5. Contisure-A computer-aided system for assessing the contouring accuracy of NC machine tools;Burdekin,1988