@software{tange_2023_7855617,
  author       = {Tange, Ole},
  title        = {GNU Parallel 20230422 ('Grand Jury')},
  month        = Apr,
  year         = 2023,
  note         = {{GNU Parallel is a general parallelizer to run
    multiple serial command line programs in parallel
      without changing them.}},
  publisher    = {Zenodo},
  doi          = {10.5281/zenodo.7855617},
  url          = {https://doi.org/10.5281/zenodo.7855617}
}
@software{m4,
  author = {{Free Software Foundation}},
  title = {GNU M4 - GNU macro processor},
  url = {https://www.gnu.org/software/m4/manual/index.html},
  version = {1.4.6},
  date = {2021-05-29},
}
@software{spin,
  author = {{Gerard J. Holzmann}},
  title = {Spin model checker},
  url = {https://spinroot.com/spin/whatispin.html},
  version = {6.5.2},
  date = {2019-12-06},
}