1. Almeida LB (1987) A learning rule for asynchronous perceptrons with feedback in a combinatorial environment. In: Butler CM (eds) Proceedings of the 1st International Conference on Neural Networks, June 1987, San Diego, pp II609–II618
2. Cohen MA, Grossberg S (1983) Absolute stability of global pattern formation and parallel memory storage by competitive neural networks. IEEE Trans SMC-13:815–825
3. Hinton GE, Rumelhart DE, Williams RJ (1986) Learning internal representations by error propagation. In: Rumelhart DE, McClelland JL (eds) Parallel distributed processing I. MIT Press, Cambridge, pp 318–362
4. Hopfield JJ (1982) Neural networks and physical systems with emergent collective computational abilities. Proc Natl Acad Sci USA 79:2554–2558
5. Hopfield JJ (1984) Neurons with graded response have collective computational properties like those of two-state neurons. Proc Natl Acad Sci USA 81:3088–3092