@misc{indiciae34dec3751bc7,
  title = {Modeling piecewise-linear systems by topological techniques.},
  author = {Happ, W. W. and Moody, D. E. and Robbins, E. R.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660054957},
  note = {Source identifier: 19660054957}
}