STD based on Hough Transform and SDR using STD results: Experiments at NTCIR-9 SpokenDoc. - Taisuke Kaneko; Tomoko Takigami; Tomoyosi Akiba (NTCIR, 2011)

Open vocabulary spoken content retrieval by front-ending with spoken term detection. - Tomoko Takigami; Tomoyosi Akiba (APSIPA, 2013)

DTW-Distance-Ordered Spoken Term Detection and STD-based Spoken Content Retrieval: Experiments at NTCIR-10 SpokenDoc-2. - Tomoyosi Akiba; Tomoko Takigami; Teppei Ohno; Kenta Kase (NTCIR, 2013)