Dragomir R. Radev Simone Teufel Horacio Saggion Wai Lam John Blitzer Hong Qi Arda Çelebi Danyu Liu Elliott Drábek Evaluation Challenges in Large-Scale Document Summarization. 375-382 2003 ACL http://acl.ldc.upenn.edu/acl2003/main/pdfs/Radev.pdf db/conf/acl/acl2003.html#RadevTSLBQCLD03