@inproceedings{Levenson:Exploding,
  title     = "High-pressure steam engines and computer software",
  author    = "Nancy G. Levenson",
  booktitle = "Proceedings of the 14th International Conference on Software Engineering, Melbourne, Australia, May 11-15, 1992",
  doi       = "https://doi.org/10.1145/143062.143076",
  editor    = "Tony Montgomery and Lori A. Clarke and Carlo Ghezzi",
  isbn      = "0-89791-504-6",
  publisher = "ACM Press",
  url       = "http://sunnyday.mit.edu/steam.pdf",
  urldate   = "June 2023",
  year      = "1992",
}
@article{Levenson:SoS,
  title   = "The drawbacks in using the term `system of systems'",
  author  = "Nancy G. Levenson",
  doi     = "https://doi.org/10.2345/0899-8205-47.2.115",
  journal = "Biomedical Instrumentation \& Technology",
  number  = "2",
  pages   = "115--118",
  volume  = "47",
  url     = "http://sunnyday.mit.edu/papers/system-of-systems.pdf",
  urldate = "June 2023",
  year    = "2013",
}