@article{154596,
  author = {Bradley Alpert and L Greengard and T Hagstrom},
  title = {Nonreflecting Boundary Conditions for the Time-Dependent Wave Equation},
  year = {2002},
  number = {180},
  month = {2002-07-01},
  publisher = {Journal of Computational Physics},
  language = {en},
}