Zero Morphemes in Unification-Based Combinatory Categorial Grammar Chinatsu Aone author Kent Wittenburg author 1990-06 text 28th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Pittsburgh, Pennsylvania, USA conference publication aone-wittenburg-1990-zero 10.3115/981823.981847 https://aclanthology.org/P90-1024/ 1990-06 188 193