An Exploration of Document Impact on Graph-Based Multi-Document Summarization Xiaojun Wan author 2008-10 text Proceedings of the 2008 Conference on Empirical Methods in Natural Language Processing Mirella Lapata editor Hwee Tou Ng editor Association for Computational Linguistics Honolulu, Hawaii conference publication wan-2008-exploration https://aclanthology.org/D08-1079/ 2008-10 755 762