@article{68441,
  author = {David Duewer and Craig Jackson and M. Esnouf and D. Winzor},
  title = {Defining and Measuring Biological Activity: Applying the Principles of Metrology},
  year = {2007},
  number = {12},
  month = {2007-10-01},
  publisher = {Accreditation and Quality Assurance},
  language = {en},
}