@article{afirstorderlogiccharacterizationof,
  title = {A first-order logic characterization of safety and co-safety languages},
  author = {Alessandro Cimatti and Luca Geatti and Nicola Gigante and Angelo Montanari and Stefano Tonetta},
  year = {2022},
  eprint = {2209.02307},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2209.02307v5},
}