@misc{indiciae9ae429d87625,
  title = {Testing questionnaires with cognitive methods: Part I, Probing questions.},
  author = {Siegfried Geyer},
  year = {2003},
  doi = {10.1007/s00038-003-3007-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/12841085/},
  note = {Source identifier: 12841085}
}