@inproceedings{rogers-lambert-2019-classes,
    title = "Some classes of sets of structures definable without quantifiers",
    author = "Rogers, James  and
      Lambert, Dakotah",
    editor = "de Groote, Philippe  and
      Drewes, Frank  and
      Penn, Gerald",
    booktitle = "Proceedings of the 16th Meeting on the Mathematics of Language",
    month = jul,
    year = "2019",
    address = "Toronto, Canada",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/fix-sig-urls/W19-5706/",
    doi = "10.18653/v1/W19-5706",
    pages = "63--77"
}