@article{constantdelayenumerationfor,
  title = {Constant-Delay Enumeration for Nondeterministic Document Spanners},
  author = {Antoine Amarilli and Pierre Bourhis and Stefan Mengel and Matthias Niewerth},
  year = {2018},
  eprint = {1807.09320},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1807.09320v5},
}