1. ISO-VIM, International Vocabulary of Basic and General Terms in Metrology, 1993, Geneva, Switzerland.
2. ISO-GUM, Guide to the expression of uncertainty in measurement, 1993, Geneva, Switzerland
3. EAL-G17 Technical Guideline, 1995, Co-ordinate Measuring Machine Calibration
4. CMM standards up-date;Peggs;Quality Today,1996
5. ISO 10360-2, Coordinate metrology - Part 2: Performance assessment of coordinate measuring machines, 1994, Geneva, Switzerland.