@PROCEEDINGS{streng2008elearningHS,
   editor = {Alina Hang, Fabian Hennecke, Sebastian Löhmann, Max Maurer, Henri Palleis, Sonja Rümelin, Emanuel von Zezschwitz, Andreas Butz, Heinrich Hußmann},   title = {Ubiquitous Computing},
   address = {Munich, Germany},
   year = {2011},
}