@techreport{GroetschelStephan2012, author = {Martin Gr{\"o}tschel and R{\"u}diger Stephan}, title = {Characterization of Facets of the Hop Constrained Chain Polytope via Dynamic Programming}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {11-54}, language = {eng}, year = {2012} }