@techreport{BorndoerferGroetschelLoebel1995, author = {Ralf Bornd{\"o}rfer and Martin Gr{\"o}tschel and Andreas L{\"o}bel}, title = {Alcuin's Transportation Problems and Integer Programming}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-95-27}, language = {eng}, year = {1995} }