@misc{indiciaeced648e4dd54,
  title = {Extended computer system simsag},
  author = {D. Zhou},
  year = {1985},
  doi = {10.1016/0098-3004(85)90033-0},
  url = {https://pubs.usgs.gov/publication/70013106},
  note = {Source identifier: 70013106}
}