The ECHO Method: Concurrency Control Method for a Large-Scale Distributed Database. - Yukari Shirota; Atsushi Iizawa; Hiroko Mano; Takashi Yano (ICDE, 1999)

Structuring and expanding queries in the probabilistic model. - Yasushi Ogawa; Hiroko Mano; Masumi Narita; Sakiko Honma (TREC, 1999)

RICOH at NTCIR-2. - Yasushi Ogawa; Hiroko Mano (NTCIR, 2001)

Selecting Expansion Terms in Automatic Query Expansion. - Hiroko Mano; Yasushi Ogawa (SIGIR, 2001)

RICOH at TREC-10: Web Track Ad-hoc Task. - Hideo Itoh; Hiroko Mano; Yasushi Ogawa (TREC, 2001)

Term Distillation for Cross-DB Retrieval. - Hideo Itoh; Hiroko Mano; Yasushi Ogawa (NTCIR, 2002)

University of Tokyo/RICOH at NTCIR-3 Web Retrieval Task. - Masashi Toyoda; Masaru Kitsuregawa; Hiroko Mano; Hideo Itoh; Yasushi Ogawa (NTCIR, 2002)

Ricoh at CLEF 2003. - Yuichi Kojima; Hideo Itoh; Hiroko Mano; Yasushi Ogawa (CLEF, 2003)

TRMeister: A DBMS with High-Performance Full-Text Search Functions. - Tetsuya Ikeda; Hiroko Mano; Hideo Itoh; Hiroshi Takegawa; Takuya Hiraoka; Shiroh Horibe; Yasushi Ogawa (ICDE, 2005)