@misc{indiciaeee9ff2e9966c,
  title = {How countries with more resources can help.},
  author = {N Mortensen},
  year = {1991},
  doi = {10.1016/0195-6701(91)90045-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/1679804/},
  note = {Source identifier: 1679804}
}