The Database Language GEM.

@inproceedings{DBLP:conf/sigmod/Zaniolo83,
  author    = {Carlo Zaniolo},
  editor    = {David J. DeWitt and
               Georges Gardarin},
  title     = {The Database Language GEM},
  booktitle = {SIGMOD'83, Proceedings of Annual Meeting, San Jose, California,
               May 23-26, 1983},
  publisher = {ACM Press},
  year      = {1983},
  pages     = {207-218},
  ee        = {http://doi.acm.org/10.1145/582192.582226, db/conf/sigmod/Zaniolo83.html},
  crossref  = {DBLP:conf/sigmod/83},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

Copyright © 1983 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.

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