1. National Metrology Institutes in Europe.
2. ISO/IEC 17025:2005;General requirements for the competence of testing and calibration laboratories
3. A rational decision making model for experimental mechanics.;E. J. Olden;Expl Tech
4. (2004) Round robin exercise for optical strain measurement.;D. A. Mendels
5. Candidate reference materials for optical strain measurement.;R. L. Burguete