@article{IM2_1984_23_1_a4,
     author = {D. I. Panyushev},
     title = {Semisimple automorphism groups of four-dimensional affine space},
     journal = {Izvestiya. Mathematics },
     pages = {171--183},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1984_23_1_a4/}
}