@article{SM_1992_73_1_a7,
     author = {A. A. Premet},
     title = {The theorem on restriction of invariants, and nilpotent elements in~$W_n$},
     journal = {Sbornik. Mathematics},
     pages = {135--159},
     year = {1992},
     volume = {73},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1992_73_1_a7/}
}