@misc{indiciaec6211ee5c738,
  title = {The world isn't flat.},
  author = {Steven Itzkowitz and Thomas Ullman},
  year = {2004},
  doi = {10.1016/s0016-5107(04)01812-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/15332035/},
  note = {Source identifier: 15332035}
}