The Description And Control Of Changing Pictures.
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\begin{bibtex} @inproceedings{DBLP:conf/ijcai/Pfinter75, title={The Description And Control Of Changing Pictures.}, pages={569-574}, year={1975}, booktitle={IJCAI}, url={http://www.informatik.uni-trier.de/~ley/db/conf/ijcai/ijcai75.html#Pfinter75}, author={G. Pfinter} }\end{bibtex}
