@techreport{BorndoerferWeismantel1997, author = {Ralf Bornd{\"o}rfer and Robert Weismantel}, title = {Set Packing Relaxations of Some Integer Programs}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-97-30}, language = {eng}, year = {1997} }