@misc{indiciaed13d43e837ca,
  title = {SPAR demonstration problems},
  author = {Yen, C. L. and Moore, R. A. and Whetstone, W. D.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19750002424},
  note = {Source identifier: 19750002424}
}