@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}
}