1. Linear algebraic groups;Borel,1969
2. Theory of Lie Groups;Chevalley,1946
3. A proof of a Selberg's hypothesis;Kazhdan;Mat. Sb.,1968
4. On a Class of Homogeneous Spaces;Marcev,1951
5. On the action of unipotent groups in the space of lattices;Margulis;Mat. Sb.,1971