R. Salaja, R. Flynn, and M. Russell. 25th IET Irish Signals & Systems Conference 2014
and 2014 China-Ireland International Conference on
Information and Communities Technologies (ISSC
2014/CIICT 2014), Institution of Engineering and Technology (IET), (2014)
R. Stiefelhagen, and J. Yang. Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on, 4, page 2617-2620 vol.4. (April 1997)