TY  - BOOK
AU  - Ballmann,Werner
TI  - LECTURES ON SPACES OF NONPOSITIVE CURVATURE
SN  - 3764352426
U1  - 516.362 
PY  - 1995///
CY  - 
PB  - Birkhauser Verlag, Basel
KW  - Metric Spaces
KW  - Geodesic Flows
ER  -