@misc{indiciaecf35b09e5f10,
  title = {Stable boundary conditions for Cartesian grid calculations},
  author = {Berger, M. J. and Leveque, R. J.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900013823},
  note = {Source identifier: 19900013823}
}