@misc{indiciae89b769b2301e,
  title = {Flutter suppression using eigenspace freedoms to meet requirements},
  author = {Adams, William M., Jr. and Fennell, Robert E. and Christhilf, David M.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890015820},
  note = {Source identifier: 19890015820}
}