@article{afunctionalitytaxonomyfordocumentsearch,
  title = {A functionality taxonomy for document search engines},
  author = {Rik D. T. Janssen and Henderik A. Proper},
  year = {2021},
  eprint = {2105.12989},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2105.12989v1},
}