@article{PORMA_1951__10_3_114525,
     author = {Santal\'o, L.A.},
     title = {On permanent vector-varieties in n dimensions},
     journal = {Portugaliae mathematica},
     pages = {125--127},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {1951},
     mrnumber = {0046706},
     zbl = {0044.40404},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1951__10_3_114525/}
}