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In: Walter Ganz, Florian Kicherer, Alexander Schletz (editor). RESER 2011 Productivity of Services Next Gen - Beyond Output/Input. European Association for Research on Services (RESER-2011) September 7-10 Hamburg Germany ISBN 978-3-8396-0298-0 Fraunhofer Verlag 2011.
To the publication© DFKI, 2022