@article{GroetschelWakabayashi1981,
  author    = {Martin Gr{\"o}tschel and Yoshiko Wakabayashi},
  title     = {On the structure of the monotone asymmetric travelling salesman polytope II},
  journal   = {Mathematical Programming Study},
  volume    = {14},
  pages     = {77 -- 97},
  year        = {1981},
}