1. Principles of Tomographic Imaging;Kak,1988
2. Neural networks and physical systems with emergent collective computational capabilities;Hopfield,1982
3. Neurons with graded responses have collective computational properties like those of two-state neurons;Hopfield,1984
4. An artificial neural network for SPECT image reconstruction;Floyd;IEEE Trans. Medical Imaging,1991
5. “Neural” computation of decisions in optimization problems;Hopfield;Biol. Cybern.,1985