@inproceedings{KKM93, author = {Keim, Daniel A. and Kriegel, Hans-Peter and Miethsam, Andreas}, booktitle = {Proc. 3rd Int. Workshop on Interoperability in Multidatabase Systems, Vienna, Austria}, pages = {96--104}, title = {Integration of Relational Databases in a Multidatabase System based on Schema Enrichment}, year = {1993} }