@misc{indiciaec11d333f5f33,
  title = {Models demonstrating instability of nonconservative mechanical systems Technical report no. 66-4},
  author = {Herrmann, G. and Nemat-Nasser, S. and Prasad, S. N.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660023136},
  note = {Source identifier: 19660023136}
}