Kelly, Paul <br/><br/>
The Non- Euclidean, hyperbolic plane 
Paul Kelly, Gordon Matthews 
 - New York  Springer-Verlag  1981 
 - XIII, 321 p  ill  25 cm 
 - Universitext .
<br/><br/> Contine bibliografie 
<br/><br/><label>ISBN: </label>3540905529 
<br/><br/><label>Dewey Class. No.: </label>516.9