@misc{indiciae140a790e23c1,
  title = {Preconditioning matrices for the pseudospectral approximation of first-order operators},
  author = {Funaro, D. and Rothman, E.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900031277},
  note = {Source identifier: 19900031277}
}