@article{SM_1973_20_3_a5,
     author = {B. O. Makarevich},
     title = {Open symmetric orbits of reductive groups in symmetric $R$-spaces},
     journal = {Sbornik. Mathematics},
     pages = {406--418},
     year = {1973},
     volume = {20},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_20_3_a5/}
}