%% -*-BibTeX-*- @Article{GroetschelMartinWeismantel1995, author = "Martin Gr{\"o}tschel and Alexander Martin and Robert Weismantel", title = "Routing in Grid Graphs by Cutting Planes", journal = "ZOR - Mathematical Methods of Operations Research", volume = "41", number = "3", pages = "255--275", year = "1995", classmath = "*90C35", language = "English", }