@incollection{GroetschelPadberg1985, author = {Martin Gr{\"o}tschel and Manfred Padberg}, title = {Polyhedral theory}, booktitle = {The Traveling Salesman Problem. A Guided Tour of Combinatorial Optimization}, editor = {Eugene Lawler and Jan Lenstra and Alexander Kan and David Shmoys}, pages = {251 -- 306}, year = {1985}, }