Martin Gogolla Mirco Kuhlmann Fabian Büttner A Benchmark for OCL Engine Accuracy, Determinateness, and Efficiency. 446-459 2008 MoDELS http://dx.doi.org/10.1007/978-3-540-87875-9_32 conf/models/2008 db/conf/models/models2008.html#GogollaKB08