Jost, Jurgen <br/><br/>
Nonpositive curvature  : geometric and analytic aspects / 

 - Basel:  Birkhauser Verlag,  1997 
 - viii, 108p. Bibl. Index. 
 - Lectures in Mathematics  ETH Zurich .
<br/><br/><label>ISBN: </label>3764357363 
<br/><br/><label>Dewey Class. No.: </label>516  / J84.NC