@misc{indiciae9833629f1313,
  title = {Back to basics with ProFlex.},
  author = {M de Ruiter},
  year = {1990},
  doi = {10.1080/00140139008927140},
  url = {https://pubmed.ncbi.nlm.nih.gov/2144232/},
  note = {Source identifier: 2144232}
}