@article{ZNSL_2009_365_a7,
     author = {N. V. Gravin and D. Yu. Shiryaev},
     title = {Abnormal subgroups of classical groups corresponding to closed sets of roots},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {151--171},
     publisher = {mathdoc},
     volume = {365},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2009_365_a7/}
}