1. International Vocabulary of Basic and General Terms in Metrology (VIM), ISO, Geneva, 1993.
2. P. De Bièvre, Are we clear on the function of matrix reference materials in the measurement process? in: A. Fagelj, M. Parkany (Editors), The Use of Matrix Reference Materials in Environmental Analytical Processes, The Royal Society of Chemistry, Cambridge, 1999, p. 170.
3. Calibration in chemical measurement processes: I. A metrological approach
4. T.E. Gills, NIST standard reference materials for measurement assurance-practices, issues and perspectives, in: A. Fagelj, M. Parkany (Editors), The Use of Matrix Reference Materials in Environmental Analytical Processes, The Royal Society of Chemistry, Cambridge, 1999, p. 59.
5. ISO 2000-01/1000, The Role of Reference Materials: Achieving Quality in Analytical Chemistry, ISO, 2000 (available in: www.iso.ch/infoe/role_ref_materials.pdf).