@article{MM2_1995__88_1_156143,
     author = {E. Heintze and J.-H. Eschenburg},
     title = {Extrinsic symmetric spaces and orbits of s-representations.},
     journal = {Manuscripta mathematica},
     pages = {517--524},
     publisher = {mathdoc},
     volume = {88},
     number = {1},
     year = {1995},
     zbl = {0857.53033},
     url = {http://geodesic.mathdoc.fr/item/MM2_1995__88_1_156143/}
}