%% -*-BibTeX-*- @Article{GroetschelPadberg1975, author = "Martin Gr{\"o}tschel and Manfred W. Padberg", title = "Partial linear characterizations of the asymmetric travelling salesman polytope", journal = "Mathematical Programming", volume = "8", pages = "378--381", year = "1975", classmath = "*90C10", language = "English", }