@inproceedings{drury-etal-2011-guided,
    title = "Guided Self Training for Sentiment Classification",
    author = "Drury, Brett  and
      Torgo, Lu{\'\i}s  and
      Almeida, Jose Joao",
    editor = "Biemann, Chris  and
      S{\o}gaard, Anders",
    booktitle = "Proceedings of Workshop on Robust Unsupervised and Semisupervised Methods in Natural Language Processing",
    month = sep,
    year = "2011",
    address = "Hissar, Bulgaria",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/W11-3902",
    pages = "9--16",
}