@article{MAN_1971__192_162166,
     author = {Richard DELANGHE},
     title = {On the {Analogue} of {Koebe's} {Theorem} for {Functions} with {Values} in a {Clifford} {Algebra.}},
     journal = {Mathematische Annalen},
     pages = {196--202},
     publisher = {mathdoc},
     volume = {192},
     year = {1971},
     zbl = {0205.09301},
     url = {http://geodesic.mathdoc.fr/item/MAN_1971__192_162166/}
}