@article{IM_1974__23_142262,
     author = {Winfried Scharlau and Anthony Bak},
     title = {Grothendieck and {Witt} {Groups} of {Orders} and {Finite} {Groups.}},
     journal = {Inventiones mathematicae},
     pages = {207--240},
     publisher = {mathdoc},
     volume = {23},
     year = {1974},
     zbl = {0288.16016},
     url = {http://geodesic.mathdoc.fr/item/IM_1974__23_142262/}
}