Ovsienko, Valentin <br/><br/>
Projective differential geometry old and new : from the Schwarzian derivative to the cohomology of diffeomorphism groups 
V. Ovsienko, S. Tabachnikov 
 - 1st ed 
 - Cambridge  Cambridge University Press  2005 
 - xi, 249 p. : ill. ; 24 cm 
<br/><br/> Includes bibliographical references (p. 236-246) and index 
<br/><br/><label>ISBN: </label>9780521831864 
<br/><br/><label>ISSN: </label>2004045919 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Projective differential geometry
<br/><br/><label>Dewey Class. No.: </label>516.36 OVS