@article{SLC_1984_10_a6,
     author = {Norbert Seifter},
     title = {Obere {Schranken} f\"ur die {Permanente} von {(1,-1)-Matrizen}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {10},
     year = {1984},
     url = {http://geodesic.mathdoc.fr/item/SLC_1984_10_a6/}
}