@inproceedings{pighin-moschitti-2009-reverse,
    title = "Reverse Engineering of Tree Kernel Feature Spaces",
    author = "Pighin, Daniele  and
      Moschitti, Alessandro",
    editor = "Koehn, Philipp  and
      Mihalcea, Rada",
    booktitle = "Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing",
    month = aug,
    year = "2009",
    address = "Singapore",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/D09-1012/",
    pages = "111--120"
}