@misc{indiciae9f37165f8df3,
  title = {Ephemeral penalty functions for contact-impact dynamics},
  author = {De La Fuente, Horacio M. and Felippa, Carlos A.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910069343},
  note = {Source identifier: 19910069343}
}