@misc{indiciae8a7724945af9,
  title = {Iterative solution of linear systems},
  author = {Freund, Roland W. and Golub, Gene H. and Nachtigal, Noel M.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19930054309},
  note = {Source identifier: 19930054309}
}