@inproceedings{Gott90a,
   author = {G.~Gottlob AND G.~Kappel AND M.~Schrefl},
   booktitle = {{Next Generation Information System Technology, Proceedings of the First East/West Databse Workshop, Kiev, USSR}},
   editor = {J.W.~Schmidt AND A.A.~Stogny},
   pages = {144--160},
   series = {Lecture Notes in Computer Science, LNCS Vol.\ 504},
   title = {{Semantics of Object-Oriented Data Models -- The Evolving Algebra Approach}},
   year = {1990}
}
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