Corpus and Evaluation Measures for Multiple Document Summarization with Multiple Sources Tsutomu Hirao author Takahiro Fukusima author Manabu Okumura author Chikashi Nobata author Hidetsugu Nanba author 2004-aug 23–aug 27 text COLING 2004: Proceedings of the 20th International Conference on Computational Linguistics COLING Geneva, Switzerland conference publication hirao-etal-2004-corpus https://aclanthology.org/C04-1077/ 2004-aug 23–aug 27 535 541