Ramsay,Arlan <br/><br/>
Introduction to hyperbolic geometry 

 - 1st 
 - New York  Springer Verlag  1995 
 - xii,287p p. 
<br/><br/><label>ISBN: </label>0-387-94339-0 
<br/><br/><label>Subjects--Index Terms: </label>Geometry, Hyperbolic