Robust Tracking of Multiple Sound Sources by Spatial Integration of Room And Robot Microphone Arrays. - Kazuhiro Nakadai; Hirofumi Nakajima; Masamitsu Murase; Satoshi Kaijiri; Kentaro Yamada; Takahiro Nakamura; Yuji Hasegawa; Hiroshi G. Okuno; Hiroshi Tsujino (ICASSP (4), 2006)