@techreport{FerreiraMartinWeismantel1993, author = {Carlos E. Ferreira and Alexander Martin and Robert Weismantel}, title = {Facets for the Multiple Knapsack Problem.}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-93-04}, language = {eng}, year = {1993} }