@misc{indiciaee7f4898191a1,
  title = {Flexible Envelope Request Notation (FERN)},
  author = {Zoch, David R. and Lavallee, David and Weinstein, Stuart},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920001832},
  note = {Source identifier: 19920001832}
}