@techreport{GleixnerHeldHuangetal.2012, author = {Ambros Gleixner and Harald Held and Wei Huang and Stefan Vigerske}, title = {Towards globally optimal operation of water supply networks}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {12-25}, language = {eng}, year = {2012} }