A computer-aided VLSI layout system. - W. A. Dees; K. M. Parmar; A. Goyal; Raymond Y. Tsui; B. D. Rathi; Robert J. Smith 001 (AFIPS National Computer Conference, 1981)

A high-density multilayer PCB router based on necessary and sufficient conditions for single row routing. - Raymond Y. Tsui; Robert J. Smith 001 (DAC, 1981)