Affiliation: | 1.Centro Singular de Investigación en Tecnoloxías da Información (CiTIUS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain ;2.Faculty of Electrical Engineering and Computer Science, Technische Universit?t Berlin, Berlin, Germany ;3.Department of Information Engineering and Computer Science, University of Trento, Trento, Italy ; |