@misc{indiciae6576c02e57aa,
  title = {Designer's unified cost model},
  author = {Freeman, William T. and Ilcewicz, L. B. and Swanson, G. D. and Gutowski, T.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19940028616},
  note = {Source identifier: 19940028616}
}