@misc{indiciaefa2b9d29a63d,
  title = {CCK hypothesis: proof and problems.},
  author = {G P Smith},
  year = {1991},
  doi = {10.1016/0195-6663(91)90090-f},
  url = {https://pubmed.ncbi.nlm.nih.gov/1952922/},
  note = {Source identifier: 1952922}
}