@inproceedings{DBLP:conf/coopis/GrefenW96,
  author    = {Paul W. P. J. Grefen and
               Jennifer Widom},
  title     = {Integrity Constraint Checking in Federated Databases},
  booktitle = {CoopIS},
  year      = {1996},
  pages     = {38-47},
  ee        = {http://doi.ieeecomputersociety.org/10.1109/COOPIS.1996.554996},
  crossref  = {DBLP:conf/coopis/1996},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/coopis/1996,
  title     = {Proceedings of the First IFCIS International Conference
               on Cooperative Information Systems (CoopIS'96), Brussels,
               Belgium, June 19-21, 1996},
  booktitle = {CoopIS},
  publisher = {IEEE Computer Society},
  year      = {1996},
  isbn      = {0-8186-7505-5},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}