Fractal dimension feature for distinguishing between overlapped speech and single-speaker speech. - Wei Li; Qian-Hua He; Yan-Xiong Li; Xueyuan Zhang; Xiao-Hvi Feng (ICMLC, 2012)

Liveness detection using time drift between lip movement and voice. - Zheng-Yu Zhu; Qian-Hua He; Xiao-Hvi Feng; Yan-Xiong Li; Zhifeng Wang 001 (ICMLC, 2013)