@article{RM_1983_38_3_a20,
     author = {R. Steinberg},
     title = {Kleinian singularities and unipotent elements},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1983},
     volume = {38},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1983_38_3_a20/}
}