@misc{indiciae002204a9fdeb,
  title = {On optimal arches},
  author = {Budiansky, B. and Frauenthal, J. C. and Hutchinson, J. W.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700045194},
  note = {Source identifier: 19700045194}
}