@article{directedregularandcontextfreelanguages,
  title = {Directed Regular and Context-Free Languages},
  author = {Moses Ganardi and Irmak Saglam and Georg Zetzsche},
  year = {2024},
  eprint = {2401.07106},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2401.07106v2},
}