Data analysis, machine learning and applications : proceedings of the 31st annual conference of the Gesellschaft fur Klassifikation e.V., Albert-Ludwigs-Universitat Freiburg, March 7-9, 2007. : 31st annual conference of the German Classification Society (Gesellschaft fur Klassifikation -- GfKl) : Mar 2007, Freiburg, Germany.
(Studies in Classification, Data Analysis, and Knowledge Organization)