1. Neural networks and physical systems with emergent collective computational capabilities;Hopfield,1982
2. Neurons with graded response have collective computational capabilities like those of two-state neurons;Hopfield,1984
3. Neural computation of decisions in optimization problems;Hopfield;Biological Cybernetics,1985
4. On the stability of TSP algorithm of Hopfield and Tank;Wilson;Biological Cybernetics,1988
5. Limitations of neural networks for solving traveling salesman problems;Gee;IEEE Transactions on Neural Networks,1995