Shervatov, V. G. <br/><br/>
Hyperbolic functions :   with configuration theorems and equivalent and equidecomposable figures 

 - New York :  Dover Publications,  ©2007. 
 - 68 p. :  ill. (b&w) ;  21.5 cm (Paperback) 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9780486458861 
<br/><br/><label>Subjects--Index Terms: </label>Exponential functions Polyhedra Polygons Geometry, Projective 
<br/><br/><label>Dewey Class. No.: </label>516.5  / SHE / G