"The Composite Information Systems Laboratory (CISL) Project at MIT."

Madnick, Stuart E., Michael Siegel and Y. Richard Wang. IEEE Data Engineering Vol. 13, No. 2 (1990): 10-15.

"Maintaining Valid Schema Integration in Evolving Heterogeneous Database Systems."

Madnick, Stuart and Michael Siegel. IEEE Office Knowledge Engineering Vol. 3, No. 2 (1989): 9-16.