@misc{indiciae11d2beb18bcb,
  title = {The Davidon-Fletcher-Powell penalty function method: A generalized iterative technique for solving parameter optimization problems},
  author = {Johnson, I. L., Jr.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19760017876},
  note = {Source identifier: 19760017876}
}