@misc{indiciae79e74bd581d4,
  title = {Difference Filter Preconditioning for Large Covariance Matrices},
  author = {Anitescu, M. and Chen, J. and Stein, M. L.},
  year = {2012},
  doi = {10.1137/110834469},
  url = {https://www.osti.gov/biblio/1105140},
  note = {Source identifier: 1105140}
}