@article{10_37236_801,
     author = {Stefan Felsner and Florian Zickfeld},
     title = {On the number of planar orientations with prescribed degrees},
     journal = {The electronic journal of combinatorics},
     year = {2008},
     volume = {15},
     doi = {10.37236/801},
     zbl = {1182.05058},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/801/}
}