A data model and architecture for VLSI/CAD databases. - Anoop Singhal; Nishit P. Parikh; Debaprosad Dutt; Chi-Yuan Lo (ICCAD, 1989)

HS: a hierarchical search package for CAD data. - Nishit P. Parikh; Chi-Yuan Lo; Anoop Singhal; Kwok W. Wu (IEEE Trans. Comput. Aided Des. Integr. Circuits Syst., 1993)