1. System and method of testing machine tools;Tlusty;Microtecnic,1959
2. Spindle accuracy;Bryan;American Machinist,1967
3. C. Goddard, Burdekin, A measuring system for the evolution of spindle rotation accuracy, Proceedings of the 13th MTDR-Conference, Birmingham, 1972.
4. A sample method for separating spindle error from test ball roundness error;Donaldson;CIRP Annals,1972
5. ANSI/ASME Standard B5.54, Method for Performance Evaluation of CNC Machining Center, 1992.