@misc{indiciaed78ab29099f7,
  title = {Programming protection: the problem of software.},
  author = {J D Slack},
  year = {1981},
  doi = {10.1111/j.1460-2466.1981.tb01214.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/7204622/},
  note = {Source identifier: 7204622}
}