International Vocabulary of Metrology – Basic and General Concepts and Associated Terms (VIM) (in English and French) (3rd ed.). Joint Committee for Guides in Metrology. 2008 https://web.archive.org/web/20110607012159/http://www.bipm.org/utils/common/documents/jcgm/JCGM_200_2008.pdf. Archived from the original (PDF) on 2011-06-07. {{cite encyclopedia}}: Missing or empty |title= (help)