S. Käbisch, A. Schmitt, M. Winter, и J. Heuer. Smart Grid Communications (SmartGridComm), 2010 First IEEE International Conference on, стр. 161 -166. (октября 2010)
J. Link, M. Büttner, D. Dallinger, и J. Richter. Working Papers "Sustainability and Innovation", S3/2010. Fraunhofer Institute for Systems and Innovation Research (ISI), (2010)