@misc{indiciae3bfec378ae06,
  title = {Accuracy of eigenvalue derivatives from reduced-order structural models},
  author = {Sandridge, Chris A. and Haftka, Raphael T.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900027679},
  note = {Source identifier: 19900027679}
}