Achim Streit Dietmar W. Erwin Thomas Lippert Daniel Mallmann Roger Menday Michael Rambadt Morris Riedel Mathilde Romberg Bernd Schuller Philipp Wieder http://arxiv.org/abs/cs/0502090 2005 CoRR abs/cs/0502090 db/journals/corr/corr0502.html#abs-cs-0502090