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2. ASTM E 1127-91. Standard Guide for Depth Profiling in Auger Electron Spectroscopy. ASTM: Philadelphia, PA, 1997.
3. Resolution in sputter depth profiling assessed by AlAs/GaAs superlattices
4. ISO Guide 30:1992. Terms and Definitions used in Connection with Reference Materials.
5. ISO Guide 31:1981. Contents of Certificates of Reference Materials.