@article{MAN_1949__121_160167,
     author = {Benno Hesselbach},
     title = {\"Uber vierdimensionale {Drehungen.}},
     journal = {Mathematische Annalen},
     pages = {22--32},
     publisher = {mathdoc},
     volume = {121},
     year = {1949},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1949__121_160167/}
}