@techreport{HumpolaFuegenschuh2013, author = {Jesco Humpola and Armin F{\"u}genschuh}, title = {A New Class of Valid Inequalities for Nonlinear Network Design Problems}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {13-06}, language = {eng}, year = {2013} }