@misc{indiciaedcebcdfbdc30,
  title = {Preserving Symmetry in Preconditioned Krylov Subspace Methods},
  author = {Chan, Tony F. and Chow, E. and Saad, Y. and Yeung, M. C.},
  year = {1996},
  url = {https://ntrs.nasa.gov/citations/19970007036},
  note = {Source identifier: 19970007036}
}