Learning optimal features for visual pattern recognition. - Kai Labusch; Udo Siewert; Thomas Martinetz; Erhardt Barth (Human Vision and Electronic Imaging, 2007)

Optimization and applications of echo state networks with leaky- integrator neurons. - Herbert Jaeger; Mantas Lukosevicius; Dan Popovici; Udo Siewert (Neural Networks, 2007)