Ballmann, W. (1995). Lectures on spaces of nonpositive curvature: With an appendix by Misha Brin: Ergodicity of geodesic flows. Birkhäuser.
Chicago-Zitierstil (17. Ausg.)Ballmann, Werner. Lectures on Spaces of Nonpositive Curvature: With an Appendix by Misha Brin: Ergodicity of Geodesic Flows. Basel [u.a.]: Birkhäuser, 1995.
MLA-Zitierstil (9. Ausg.)Ballmann, Werner. Lectures on Spaces of Nonpositive Curvature: With an Appendix by Misha Brin: Ergodicity of Geodesic Flows. Birkhäuser, 1995.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.