@misc{indiciae275c09a120a3,
  title = {Two classes of creativity--improving systematic reviews.},
  author = {J A Muir Gray},
  year = {1994},
  doi = {10.1136/jech.48.1.4},
  url = {https://pubmed.ncbi.nlm.nih.gov/8138767/},
  note = {Source identifier: 8138767}
}