@article{MZ_1952__56_169269,
     author = {S.D. Puppe},
     title = {Minkowskische {Einheiten} und {Verschlingungsinvarianten} von {Knoten.}},
     journal = {Mathematische Zeitschrift},
     pages = {33--48},
     publisher = {mathdoc},
     volume = {56},
     year = {1952},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1952__56_169269/}
}