@article{GDZPPN00046273X,
title = {The Trapping Property of Totally Geodesic Hyperplanes in Hadamard Spaces.},
journal = {Geometric and functional analysis},
volume = {6},
year = {1996},
pages = {689-702},
zbl = {0865.53028},
url = {http://dml.mathdoc.fr/item/GDZPPN00046273X}
}
Lang, U. The Trapping Property of Totally Geodesic Hyperplanes in Hadamard Spaces.. Geometric and functional analysis, Tome 6 (1996) pp. 689-702. http://gdmltest.u-ga.fr/item/GDZPPN00046273X/