@misc{indiciae72e9f62f2fa9,
  title = {Inference in Directed Acyclic Graphs with Applications to Hidden Markov Model Structures},
  author = {Smyth, P.},
  year = {1995},
  url = {https://ntrs.nasa.gov/citations/20060037345},
  note = {Source identifier: 20060037345}
}