TY  - BOOK
AU  - Ballmann, Werner
TI  - Lectures on spaces of nonpositive curvature
SN  - 9783764352424
SN  - 95038397
U1  - 514.7 BAL 
PY  - 1995///
CY  - Basel ; Boston
PB  - Birkhäuser Verlag
KW  - Geodesic flows
KW  - Metric spaces
N1  - Includes bibliographical references (p. [97]-109) and index
ER  -