@misc{indiciae4b51dc668fa3,
  title = {Spectral multigrid methods for elliptic equations},
  author = {Zang, T. A. and Wong, Y. S. and Hussaini, M. Y.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810025345},
  note = {Source identifier: 19810025345}
}