1. Nonlinear programming without computation;Chua;IEEE Transactions on Circuits and Systems,1984
2. Neural networks and physical systems with emergent collective computational abilities;Hopfield,1982
3. Neurons with graded response have collective computational properties like those of two-state neurons;Hopfield,1984
4. Mathematical Programming and Electrical Networks;Dennis,1959
5. Theory of Nonlinear Networks and Systems;Stern,1965