@inproceedings{pilan-etal-2014-rule,
    title = "Rule-based and machine learning approaches for second language sentence-level readability",
    author = "Pil{\'a}n, Ildik{\'o}  and
      Volodina, Elena  and
      Johansson, Richard",
    editor = "Tetreault, Joel  and
      Burstein, Jill  and
      Leacock, Claudia",
    booktitle = "Proceedings of the Ninth Workshop on Innovative Use of {NLP} for Building Educational Applications",
    month = jun,
    year = "2014",
    address = "Baltimore, Maryland",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/W14-1821/",
    doi = "10.3115/v1/W14-1821",
    pages = "174--184"
}