1. International Standards Organization (ISO), ISO 230–1:1996 Test code for machine tools – part 1: geometric accuracy of machines operating under no-load or finishing conditions.
2. A definition of volumetric error;Wang;Manufacturing Engineering,2005
3. Definitions and correlations of 3D volumetric positioning errors of CNC machining centers;Svoboda,2004
4. American Society of Mechanical Engineers (ASME). B5.54: Methods for performance evaluation of computer numerically controlled machining centers, 1992.
5. International Standards Organization (ISO). ISO 230–6: Test code for machine tools, Part 6: Determination of positioning accuracy on body and face diagonals (diagonal displacement tests), 2002.