@misc{indiciae1262c0f00ccb,
  title = {Null method or operational model?},
  author = {D Mackay},
  year = {1989},
  doi = {10.1016/0165-6147(89)90098-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/2595792/},
  note = {Source identifier: 2595792}
}