1. International vocabulary of metrology – Basic and general concepts and associated terms (VIM), ISO/IEC Guide 99 (2007)
2. Guide to the expression of uncertainty in measurement, ISO (1995)
3. Standard Practice for Use of the International System of units (SI), American Society for Testing and Materials E 380–91 (1991)
4. Standard Practice for Dealing with Outlying Observations, American Society for Testing and Materials, E 178–02 (Reapproved 2002)
5. National Measurement Accreditation Service, B 3003, English National Physical Laboratory, Teddington (1986)