1. Ramsey MH, Ellison SLR (eds) (2007) Eurachem/EUROLAB/CITAC/Nordtest/AMC guide. Measurement uncertainty arising from sampling: a guide to methods and approaches. Available from the Eurachem Secretariat at http://www.eurachem.org
2. Nordisk Innovations Centre (NICe) (2007) Uncertainty from sampling. A Nordtest handbook for sampling planners on sampling quality assurance and uncertainty estimation. Prepared by Grøn C, Magnusson B, Nordbotten A, Krysell M, Andersen KJ, Lund U. Report number NT tec 604, available at http://www.nordicinnovation.net/article.cfm?id=1-834-741
3. ISO Guide 99 (2007) International vocabulary of metrology––basic and general concepts and associated terms, VIM, 3rd edn. ISO, Geneva, Switzerland
4. IUPAC (2005) Terminology in soil sampling (IUPAC recommendation 2005), Prepared for publication by De Zorzi P, Barbizzi S, Belli M, Ciceri G, Fajgelj A, Moore D, Sansone U, and Van der Perk M. Pure Appl Chem 77(5):827–884