Masaki Murata, Hitoshi Isahara. Using the Diff Command in Patent Documents. In Keizo Oyama, Emi Ishida, Noriko Kando, editors, Proceedings of the Third NTCIR Workshop on Research in Information Retrieval, Automatic Text Summarization and Question Answering, NTCIR-3, Tokyo, Japan, October 8-10, 2002. National Institute of Informatics (NII), 2002. [doi]