Sujian Li Yu Zhang Wei Wang 0013 Chen Wang Using Proximity in Query Focused Multi-document Extractive Summarization. 179-188 2009 ICCPOL http://dx.doi.org/10.1007/978-3-642-00831-3_17 conf/iccpol/2009 db/conf/iccpol/iccpol2009.html#LiZWW09