TY - JOUR AU - V. L. Popov TI - Closed orbits of Borel subgroups JO - Sbornik. Mathematics PY - 1989 SP - 375 EP - 392 VL - 63 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1989_63_2_a7/ LA - en ID - SM_1989_63_2_a7 ER -