@article{JRAM_1991__420_153358,
     author = {Carlos Olmos and Cristi\'an S\'anchez},
     title = {A geometric characterization of the orbits of s-representations.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {195--202},
     publisher = {mathdoc},
     volume = {420},
     year = {1991},
     zbl = {0727.53012},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1991__420_153358/}
}