@misc{indiciaeb935fd062fa1,
  title = {Nested Krylov methods and preserving the orthogonality},
  author = {Desturler, Eric and Fokkema, Diederik R.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940019208},
  note = {Source identifier: 19940019208}
}