@misc{indiciaee4061bc9d868,
  title = {A spectral algorithm for envelope reduction of sparse matrices},
  author = {Barnard, Stephen T. and Pothen, Alex and Simon, Horst D.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19950028509},
  note = {Source identifier: 19950028509}
}