Copying in Natural Languages, Context-Freeness, and Queue Grammars Alexis Manaster-Ramer author 1986-07 text 24th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics New York, New York, USA conference publication manaster-ramer-1986-copying 10.3115/981131.981145 https://aclanthology.org/P86-1014/ 1986-07 85 89