@misc{indiciaecc2d43ca46eb,
  title = {The research problem, purpose, hypotheses: what is this study about?},
  author = {J A Heermann and M E Megel},
  year = {1993},
  doi = {10.1097/00006527-199301330-00016},
  url = {https://pubmed.ncbi.nlm.nih.gov/8121943/},
  note = {Source identifier: 8121943}
}