@misc{indiciae35a15478d8fa,
  title = {Defining intractability: comparisons among published definitions.},
  author = {Anne T Berg and Molly M Kelly},
  year = {2006},
  doi = {10.1111/j.1528-1167.2006.00440.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/16499772/},
  note = {Source identifier: 16499772}
}