Stephen J. Hegner. Horn Extended Feature Structures: Fast Unification With Negation And Limited Disjunction. In EACL. pages 33-38, 1991. [doi]
@inproceedings{Hegner91:0, title = {Horn Extended Feature Structures: Fast Unification With Negation And Limited Disjunction}, author = {Stephen J. Hegner}, year = {1991}, url = {http://acl.ldc.upenn.edu/E/E91/E91-1007.pdf}, researchr = {https://researchr.org/publication/Hegner91%3A0}, cites = {0}, citedby = {0}, pages = {33-38}, booktitle = {EACL}, }