Stav dette: Algorithms for sensor systems : 7th International Symposium on Algorithms for Sensor Systems, Wireless Ad Hoc Networks and Autonomous Mobile Entities, ALGOSENSORS 2011, Saarbrücken, Germany, September 8-9, 2011 : revised selected papers / Thomas Erlebach, Sotiris Nikoletseas, Pekka Orponen (eds.).