@misc{indiciaecc90032b7df8,
  title = {Method for nonlinear optimization with discrete design variables},
  author = {Olsen, Gregory R. and Vanderplaats, Garret N.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900025786},
  note = {Source identifier: 19900025786}
}