@article{AA_2016_28_4_a1,
     author = {A. Bak and A. Stepanov},
     title = {Subring subgroups of symplectic groups in characteristic~2},
     journal = {Algebra i analiz},
     pages = {47--61},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AA_2016_28_4_a1/}
}