Adrian Popescu Hervé Le Borgne Pierre-Alain Moëllic Conceptual Image Retrieval over a Large Scale Database. 771-778 2008 CLEF http://dx.doi.org/10.1007/978-3-642-04447-2_100 conf/clef/2008 db/conf/clef/clef2008.html#PopescuBM08