Wei Xu Chunfa Yuan Wenjie Li Mingli Wu Kam-Fai Wong Building Document Graphs for Multiple News Articles Summarization: An Event-Based Approach. 181-188 2006 conf/iccpol/2006 ICCPOL http://dx.doi.org/10.1007/11940098_19 db/conf/iccpol/iccpol2006.html#XuYLWW06