H. Ashman, J. Verbyla, und T. Cawley. Australasian Database Conference, Seite 247-257. Global Publications Service, Singapore; Distributed by World Scientific, (1994)
B. Theobald, J. Bangham, I. Matthews, und G. Cawley. Proceedings of the 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 4, Seite 3892-3895. Orlando, FL, USA, (Mai 2002)