@article{MAN_1935__110_159747,
     author = {F.J. Wecken},
     title = {Zur {Theorie} linearer {Operatoren}},
     journal = {Mathematische Annalen},
     pages = {722--725},
     publisher = {mathdoc},
     volume = {110},
     year = {1935},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1935__110_159747/}
}