@article{MS2_1963__12_165831, author = {Helge Tverberg}, title = {On the {Permanent} of a {Bistochastik} {Matrix.}}, journal = {Mathematica Scandinavica}, pages = {25--35}, publisher = {mathdoc}, volume = {12}, year = {1963}, zbl = {0117.01502}, url = {http://geodesic.mathdoc.fr/item/MS2_1963__12_165831/} }