@techreport{GroetschelMartinWeismantel1993, author = {Martin Gr{\"o}tschel and Alexander Martin and Robert Weismantel}, title = {Optimum Path Packing on Wheels: The Noncrossing Case.}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-93-26}, language = {eng}, year = {1993} }