RitsQA: Ritsumeikan Question Answering System used for QAC-1. - Jun-ichi Fukumoto; Tetsuya Endo; Tatsuhiro Niwa (NTCIR, 2002)

Observation-based Assistance by Mobile Robot for Object Handling of its Partner Robot. - Toyomi Fujita; Tetsuya Endo (ICINCO (2), 2013)