Version Management of Composite Objects in CAD Databases
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\begin{bibtex} @inproceedings{DBLP:conf/sigmod/AhmedN91, crossref={DBLP:conf/sigmod/91}, title={Version Management of Composite Objects in CAD Databases}, pages={218-227}, cdrom={SIGMOD91/P218.PDF}, year={1991}, booktitle={SIGMOD Conference}, url={http://www.informatik.uni-trier.de/~ley/db/conf/sigmod/sigmod91.html#AhmedN91}, ee={http://doi.acm.org/10.1145/115790.115825}, ee={db/conf/sigmod/AhmedN91.html}, author={Rafi Ahmed and Shamkant B. Navathe} }\end{bibtex}
