@misc{indiciae23eba1aef589,
  title = {Unifying Model-Based and Reactive Programming within a Model-Based Executive},
  author = {Williams, Brian C. and Gupta, Vineet and Norvig, Peter},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20020038834},
  note = {Source identifier: 20020038834}
}