@article{article,
  author = {Susan Tai and Richard Christensen and Lane Sander and Michael Welch},
  title = {The Certification of Morphine-3-\&$\#$946;-D-Glucuronide in a Human Urine Standard Reference Material},
  year = {1997},
  number = {357},
  month = {1997-02-01},
  publisher = {Fresenius Journal of Analytical Chemistry},
  language = {en},
}