@article{MAN_1932__106_159554,
     author = {W. Magnus},
     title = {Das {Identit\"atsproblem} f\"ur {Gruppen} mit einer definierenden {Relation}},
     journal = {Mathematische Annalen},
     pages = {CCXCV--CCCVII},
     publisher = {mathdoc},
     volume = {106},
     year = {1932},
     zbl = {58.0125.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1932__106_159554/}
}