@article{undecidabilityinfinitetransducersdefense,
  title = {Undecidability in Finite Transducers, Defense Systems and Finite Substitutions},
  author = {Vesa Halava},
  year = {2021},
  eprint = {2111.15420},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2111.15420v1},
}