@misc{indiciae5b5c7aa2d4a3,
  title = {Finite elements for contact problems in two-dimensional elastodynamics},
  author = {Zimmermann, T. K. and Liu, W. K.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19800024264},
  note = {Source identifier: 19800024264}
}