Eberlein, P.B <br/><br/>
Geometry of nonpositively curved manifolds 
P.B. Eberlein 
 - Chicago  University of Chicago Press  1996 
 - vi  449 
 - Chicago lectures in mathematics .
<br/><br/><label>ISBN: </label>9780226181974 
<br/><br/><label>Dewey Class. No.: </label>8.05+8.06  / EBER