@article{MZ_1932__35_168372,
     author = {H., Seifert},
     title = {Homologiegruppe berandeter dreidimensionaler {Mannigfaltigkeiten}},
     journal = {Mathematische Zeitschrift},
     pages = {609--611},
     publisher = {mathdoc},
     volume = {35},
     year = {1932},
     zbl = {58.0619.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1932__35_168372/}
}