@misc{indiciaed0ff9e008f40,
  title = {Reference materials--a main element in a coherent reference measurement system.},
  author = {R Dybkaer},
  year = {1991},
  doi = {10.1515/cclm.1991.29.4.241},
  url = {https://pubmed.ncbi.nlm.nih.gov/1868129/},
  note = {Source identifier: 1868129}
}