@misc{indiciae7f517cfda8fe,
  title = {Spectral multigrid methods for elliptic equations II},
  author = {Zang, T. A. and Wong, Y. S. and Hussaini, M. Y.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19840056632},
  note = {Source identifier: 19840056632}
}