@misc{indiciaef0ac0a970b9c,
  title = {A practical approach to designing and performing a focused study.},
  author = {M M Jackson},
  year = {1997},
  doi = {10.1016/s0196-6553(97)90074-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/9437489/},
  note = {Source identifier: 9437489}
}