@techreport{OrlowskiPioro2008, author = {Sebastian Orlowski and Michal Pi{\´o}ro}, title = {On the complexity of column generation in survivable network design with path-based survivability mechanisms}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {08-51}, language = {eng}, year = {2008} }