@misc{indiciaebb36120787db,
  title = {Conjugate gradient coupled with multigrid for an indefinite problem},
  author = {Gozani, J. and Nachshon, A. and Turkel, E.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19840021489},
  note = {Source identifier: 19840021489}
}