@inproceedings{Klas88a,
   author = {W.~Klas AND E.J.~Neuhold AND M.~Schrefl},
   booktitle = {{Research into Networks and Distributed Applications: European Teleinformatics Conference (EUTECO `88), Vienna, Austria, April 20--22, 1988}},
   editor = {R.~Speth},
   title = {{On an Object-Oriented Data Model for a Knowledge Base}},
   year = {1988}
}
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