@article{MAN_1956__132_160518,
     author = {M. Landsberg},
     title = {Filter mit endlichem {Index} und {Linearformen} auf {Produkten} {RJ.}},
     journal = {Mathematische Annalen},
     pages = {256--262},
     publisher = {mathdoc},
     volume = {132},
     year = {1956},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1956__132_160518/}
}