@misc{indiciae0f2f95ef10ac,
  title = {Nonlinear analysis of structures},
  author = {Armen, H., Jr. and Levine, H. and Pifko, A. and Levy, A.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740012450},
  note = {Source identifier: 19740012450}
}