@article{IM_1971__12_142067,
     author = {J. Igusa},
     title = {On {Certain} {Representations} of {Semi-Simple} {Algebraic} {Groups} and the {Arithmetic} of the {Corresponding} {Invariants.}},
     journal = {Inventiones mathematicae},
     pages = {62--94},
     publisher = {mathdoc},
     volume = {12},
     year = {1971},
     zbl = {0206.23902},
     url = {http://geodesic.mathdoc.fr/item/IM_1971__12_142067/}
}