@misc{indiciaeb73bbf0dd1e1,
  title = {The enemy system.},
  author = {J E Mack},
  year = {1988},
  doi = {10.1016/s0140-6736(88)92848-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/2899786/},
  note = {Source identifier: 2899786}
}