Astala, K., et al <br/><br/>
Elliptic partial differential equations & quasiconformal mappings in the plane 
K. Astala, et al 
 - Princeton  Princeton University Press  2009 
 - xvi  677 
 - Princeton mathematical series 48 .
<br/><br/><label>ISBN: </label>9780691137773 
<br/><br/><label>Dewey Class. No.: </label>10.03+4.08  / ASTA