@techreport{GroetschelPadberg1994, author = {Martin Gr{\"o}tschel and Manfred Padberg}, title = {Ulysses 2000: In Search of Optimal Solutions to Hard Combinatorial Problems.}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-93-34}, language = {eng}, year = {1994} }