@inproceedings{lieberman-etal-1965-automatic, title = "Automatic Deep Structure Analysis Using an Approximate Formalism", author = "Lieberman, D. and Lochak, D. and Ochel, K.", booktitle = "COLING 1965", year = "1965", url = "https://preview.aclanthology.org/fix-sig-urls/C65-1031/" }