H. Jin, R. Schwartz, S. Sista, and F. Walls. Proceedings of the DARA Broadcast News Workshop, page 199--224. Morgan Kauffman Publisher, (February 1999)
T. Isobe, M. Fujiwara, H. Kaneta, T. Morita, and N. Uratani. ICCE: 2005 INTERNATIONAL CONFERENCE ON CONSUMER ELECTRONICS, DIGEST OF
TECHNICAL PAPERS, page 157-158. 345 E 47TH ST, NEW YORK, NY 10017 USA, IEEE, (2005)23rd Annual International Conference on Consumer Electronics (ICCE),
Las Vegas, NV, JAN 08-12, 2005.