@article{IM2_1984_22_3_a4,
     author = {V. L. Popov},
     title = {Syzygies in the theory of invariants},
     journal = {Izvestiya. Mathematics},
     pages = {507--585},
     year = {1984},
     volume = {22},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1984_22_3_a4/}
}