@article{MAT_1972_16_3_a0,
     author = {A. Borel and J. Tits},
     title = {\'El\'ements unipotents et sous-groupes paraboliques de groupes {r\'eductifs.~I}},
     journal = {Matematika},
     pages = {3--12},
     publisher = {mathdoc},
     volume = {16},
     number = {3},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1972_16_3_a0/}
}