@inproceedings{andreka-etal-1980-model,
    title = "Model Theoretic Semantics for Many-Purpose Languages and Language Hierarchies",
    author = "Andr{\'e}ka, H.  and
      Gergely, T.  and
      N{\'e}meti, I.",
    booktitle = "{COLING} 1980 Volume 1: The 8th International Conference on Computational Linguistics",
    year = "1980",
    url = "https://preview.aclanthology.org/sigarab-more-entries-6621/C80-1031/"
}