The Hirsch Conjecture Fails for Triangulated 27-Spheres

@article{Walkup1978TheHC,
  title={The Hirsch Conjecture Fails for Triangulated 27-Spheres},
  author={David W. Walkup},
  journal={Math. Oper. Res.},
  year={1978},
  volume={3},
  pages={224-230}
}