@article{GFA_1996__6_1_58244,
     author = {U. Lang},
     title = {The {Trapping} {Property} of {Totally} {Geodesic} {Hyperplanes} in {Hadamard} {Spaces.}},
     journal = {Geometric and functional analysis},
     pages = {689--702},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1996},
     zbl = {0865.53028},
     url = {http://geodesic.mathdoc.fr/item/GFA_1996__6_1_58244/}
}