@misc{indiciae6c04252d66d6,
  title = {Planar torsion spring},
  author = {Ihrke, Chris A. and Parsons, Adam H. and Mehling, Joshua S. and Griffith, Bryan Kristian},
  year = {2012},
  url = {https://ntrs.nasa.gov/citations/20120009524},
  note = {Source identifier: 20120009524}
}