@misc{indiciaed57190318014,
  title = {Primary-backup protocols: Lower bounds and optimal implementations},
  author = {Budhiraja, Navin and Marzullo, Keith and Schneider, Fred B. and Toueg, Sam},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920009782},
  note = {Source identifier: 19920009782}
}