Masaharu Yoshioka, Makoto Haraguchi. Study on the Combination of Probabilistic and Boolean IR Models for WWW Documents Retrieval. In Noriko Kando, Haruko Ishikawa, editors, Proceedings of the Fourth NTCIR Workshop on Research in Information Access Technologies Information Retrieval, Question Answering and Summarization, NTCIR-4, National Center of Sciences, Tokyo, Japan, June 2-4, 2004. National Institute of Informatics (NII), 2004. [doi]