@inproceedings{powers-1997-learning,
    title = "Learning and Application of Differential Grammars",
    author = "Powers, David M. W.",
    booktitle = "{C}o{NLL}97: Computational Natural Language Learning",
    year = "1997",
    url = "https://preview.aclanthology.org/Add-Cong-Liu-Florida-Atlantic-University-author-id/W97-1011/"
}