@misc{indiciae874f459bf4f9,
  title = {Semi-Markov Unreliability Range Evaluator},
  author = {Butler, Ricky W. and Boerschlein, David P.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930000723},
  note = {Source identifier: 19930000723}
}