@techreport{BetkerKosiankowskiLangeetal.2012, author = {Andreas Betker and Dirk Kosiankowski and Christoph Lange and Frank Pfeuffer and Christian Raack and Axel Werner}, title = {Energy efficiency in extensive multilayer core and regional networks with protection}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {12-45}, language = {eng}, year = {2012} }