@article{comparingthenotionsofopacityfordiscete,
  title = {Comparing the Notions of Opacity for Discrete-Event Systems},
  author = {Jiří Balun and Tomáš Masopust},
  year = {2021},
  eprint = {2102.02889},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2102.02889v2},
}