@article{SM_1972_18_2_a4,
     author = {B. Kh. Kirshtein},
     title = {Invariant subrings of the induced ring on the $4\times4$ symplectic group},
     journal = {Sbornik. Mathematics},
     pages = {228--234},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_18_2_a4/}
}