%% -*-BibTeX-*- @Article{GroetschelWakabayashi1981a, author = "Martin Gr{\"o}tschel and Yoshiko Wakabayashi", title = "On the structure of the monotone asymmetric travelling salesman polytope {I}: hypohamiltonian facets", journal = "Discrete Mathematics", volume = "34", pages = "43--59", year = "1981", classmath = "*05C45 05C70 05C35 90C10", language = "English", }