@article{SM_1990_65_1_a4,
     author = {A. A. Sukhanov},
     title = {Description of the observable subgroups of linear algebraic groups},
     journal = {Sbornik. Mathematics},
     pages = {97--108},
     year = {1990},
     volume = {65},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1990_65_1_a4/}
}