@article{MZ_1984__185_173388,
     author = {Luzius Grunenfelder},
     title = {Clifford k-algebras and k*-groups.},
     journal = {Mathematische Zeitschrift},
     pages = {137--150},
     publisher = {mathdoc},
     volume = {185},
     year = {1984},
     zbl = {0528.20035},
     url = {http://geodesic.mathdoc.fr/item/MZ_1984__185_173388/}
}