@article{JAC_2009__30_1_a0,
     author = {De Loera, J.A. and Liu, F. and Yoshida, R.},
     title = {A generating function for all semi-magic squares and the volume of the {Birkhoff} polytope},
     journal = {Journal of Algebraic Combinatorics},
     pages = {113--139},
     publisher = {mathdoc},
     volume = {30},
     number = {1},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2009__30_1_a0/}
}