@misc{indiciaef749b5af8214,
  title = {The 40-60\% problem.},
  author = {G R Newell},
  year = {1979},
  doi = {10.1093/jnci/63.3.539},
  url = {https://pubmed.ncbi.nlm.nih.gov/288923/},
  note = {Source identifier: 288923}
}