@article{MZ_1982__179_173128,
     author = {Ulrich Schwardmann},
     title = {Obstructions for {Clifford} {Structures} on {Vector} {Bundles.}},
     journal = {Mathematische Zeitschrift},
     pages = {69--72},
     publisher = {mathdoc},
     volume = {179},
     year = {1982},
     zbl = {0458.57015},
     url = {http://geodesic.mathdoc.fr/item/MZ_1982__179_173128/}
}