@inproceedings{stratos-etal-2013-spectral,
    title = "Spectral Learning of Refinement {HMM}s",
    author = "Stratos, Karl  and
      Rush, Alexander  and
      Cohen, Shay B.  and
      Collins, Michael",
    editor = "Hockenmaier, Julia  and
      Riedel, Sebastian",
    booktitle = "Proceedings of the Seventeenth Conference on Computational Natural Language Learning",
    month = aug,
    year = "2013",
    address = "Sofia, Bulgaria",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/W13-3507/",
    pages = "56--64"
}