Multi-Document Summarization Using A* Search and Discriminative Learning Ahmet Aker author Trevor Cohn author Robert Gaizauskas author 2010-10 text Proceedings of the 2010 Conference on Empirical Methods in Natural Language Processing Hang Li editor Lluís Màrquez editor Association for Computational Linguistics Cambridge, MA conference publication aker-etal-2010-multi https://aclanthology.org/D10-1047/ 2010-10 482 491