@misc{indiciaefcfb8712552a,
  title = {GCS plan for software aspects of certification},
  author = {Shagnea, Anita M. and Lowman, Douglas S. and Withers, B. Edward},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900011378},
  note = {Source identifier: 19900011378}
}