@article{10_37236_4499,
     author = {Andreas Paffenholz},
     title = {Faces of {Birkhoff} polytopes},
     journal = {The electronic journal of combinatorics},
     year = {2015},
     volume = {22},
     number = {1},
     doi = {10.37236/4499},
     zbl = {1311.52015},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/4499/}
}