Analogue optoelectronic implementation of a neural network with in-situ learning - T. C. B. Yu; Robert J. Mears; A. B. Davey; William A. Crossland; M. W. G. Snook; Neil Collings; M. Birch (Proceedings of International Conference on Neural Networks (ICNN'95), Perth, WA, Australia, November 27 - December 1, 1995, 1995)