@misc{indiciaefa0d7982cb7a,
  title = {DYGABCD: A program for calculating linear A, B, C, and D matrices from a nonlinear dynamic engine simulation},
  author = {Geyser, L. C.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19780025167},
  note = {Source identifier: 19780025167}
}