Experimental Demonstrations of Optical Neural Computers. - Ken Hsu; David Brady; Demetri Psaltis (NIPS, 1987)

Invariance and discrimination properties of the optical associative loop. - Ken Hsu; Demetri Psaltis (ICNN, 1988)

Optoelectronic implementations of neural networks. - Demetri Psaltis; Alan A. Yamamura; Ken Hsu; Steven Lin; Xiang-guang Gu; David Brady (IEEE Commun. Mag., 1989)