@inproceedings{GroetschelMartinWeismantel1993, author = {Martin Gr{\"o}tschel and Alexander Martin and Robert Weismantel}, title = {Routing in grid graphs by cutting planes}, booktitle = {Integer Programming and Combinatorial Optimization. Proceedings of a Conference held at Centro Ettore Majorana, Erice, Italy, April 29 - May 1, 1993}, editor = {Giovanni Rinaldi and Laurence Wolsey}, pages = {447 -- 461}, year = {1993}, }