@misc{indiciae7d57eab33edc,
  title = {Optimal primary-backup protocols},
  author = {Budhiraja, Navin and Marzullo, Keith and Schneider, Fred B. and Toueg, Sam},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920024866},
  note = {Source identifier: 19920024866}
}