@misc{indiciae2d8cc2f2e4ab,
  title = {Exercise apparatus},
  author = {Schaffner, Grant and Bentley, Jason R. and Loehr, James A. and Gundo, Daniel P.},
  year = {2006},
  url = {https://ntrs.nasa.gov/citations/20080008640},
  note = {Source identifier: 20080008640}
}