On the Succinctness Properties of Unordered Context-Free Grammars M Drew Moshier author William C Rounds author 1987-07 text 25th Annual Meeting of the Association for Computational Linguistics Association for Computational Linguistics Stanford, California, USA conference publication moshier-rounds-1987-succinctness 10.3115/981175.981191 https://aclanthology.org/P87-1016/ 1987-07 112 116