@misc{indiciae9ad32e12344e,
  title = {Simplified and refined structural modeling for economical flutter analysis and design},
  author = {Ricketts, R. H. and Sobieszczanski, J.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770042939},
  note = {Source identifier: 19770042939}
}