NTCIR Experiments at Matsushita: Ad-hoc and CLIR Task. - Mitsuhiro Sato; Hayashi Ito; Naohiko Noguchi (NTCIR, 1999)

NTCIR-2 Experiments at Matsushita: Monolingual and Cross-Lingual IR Tasks. - Mitsuhiro Sato; Naohiko Noguchi (NTCIR, 2001)

NTCIR-3 QAC Experiments at Matsushita. - Masako Nomoto; Mitsuhiro Sato; Hiroyuki Suzuki (NTCIR, 2002)

NTCIR-4 QAC Experiments at Matsushita. - Masako Nomoto; Yoshio Fukushige; Mitsuhiro Sato; Hiroyuki Suzuki (NTCIR, 2004)

Are We Making Progress? - An Analysis of NTCIR QAC1 and 2. - Masako Nomoto; Yoshio Fukushige; Mitsuhiro Sato; Hiroyuki Suzuki (NTCIR, 2004)