Kelly, Paul Joseph. <br/><br/>
The non-Euclidean hyperbolic plane :  its structure and consistency / 
P. Kelly, G. Matthews. 
 - New York :  Springer-Verlag,  1981. 
 - xiii, 333 p.  ill. ;  24 cm. 
 - Universitext .
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>3540905529 (New York) 0387905529 (Berlin) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry, Hyperbolic