Misato Ohkita, Yoshiaki Bando, Yukara Ikemiya, Eita Nakamura, Katsutoshi Itoyama, Kazuyoshi Yoshii, "Audio-Visual Beat Tracking Based on a State-Space Model for a Robot Dancer Performing with a Human Dancer," Journal of Robotics and Mechatronics, Vol. 29, No. 1, pp. 125-136, 2017. \bibitem{2017DancingRobot} M.~Ohkita, Y.~Bando, Y.~Ikemiya, E.~Nakamura, K.~Itoyama, and K.~Yoshii, ``Audio-Visual Beat Tracking Based on a State-Space Model for a Robot Dancer Performing with a Human Dancer'' {\it J.\ Robotics and Mechatronics}, Vol.~29, No.~1, pp.~125--136, 2017.