@article{MAN_1966__165_161438,
     author = {S. HELGASON},
     title = {Totally {Geodesic} {Spheres} in {Compact} {Symmetrie} {Spaces.}},
     journal = {Mathematische Annalen},
     pages = {309--317},
     publisher = {mathdoc},
     volume = {165},
     year = {1966},
     zbl = {0142.19204},
     url = {http://geodesic.mathdoc.fr/item/MAN_1966__165_161438/}
}