@article{MM2_1995__86_3_156046,
     author = {Viktor Schroeder and Sebastian Goette},
     title = {Totally geodesic hypersurfaces in manifolds of nonpositive curvature.},
     journal = {Manuscripta mathematica},
     pages = {169--184},
     publisher = {mathdoc},
     volume = {86},
     number = {3},
     year = {1995},
     zbl = {0830.53034},
     url = {http://geodesic.mathdoc.fr/item/MM2_1995__86_3_156046/}
}