Schwerdtfeger, Hans. <br/><br/>
Geometry of complex numbers :  circle geometry, Moebius transformation, non-euclidean geometry / 
Hans Schwerdtfeger. 
 - New York :  Dover,  1979. 
 - xiii, 200 p. :  ill. ;  21 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. [191]-198. 
<br/><br/><label>ISBN: </label>0486638308 
<br/><br/><label>LCCN: </label>79052529  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Numbers, Complex.<br/>Geometry.<br/>Functions of complex variables.<br/>Analytic functions.
<br/><br/><label>Dewey Class. No.: </label>512.78  / S415