1. SPOTS Standardization project for optical techniques of strain measurements, EU contract G6RD-CT-2002-00856, see http://www.opticalstrain.org
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3. Burguete R, Hack E, Patterson E, Siebert T, Whelan M (2010) Guidelines for the calibration of optical systems for strain measurements, Part II: validation, see http://www.opticalstrain.org
4. http://www.gdr2519.cnrs.fr/
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