@misc{indiciae64a4b78db81e,
  title = {Research on optimization-based design},
  author = {Balling, R. J. and Parkinson, A. R. and Free, J. C.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890015805},
  note = {Source identifier: 19890015805}
}