Mason,L.J. <br/><br/>
Further advances of twistor;v 2  integrable systems, conformal geometry and gravitation 

 - New York  Longman Scientific&Technical  1995 
 - 272p.  22cm. 
 - Pitman research notes in mathematics series .
<br/><br/><label>ISBN: </label>0582004659 
<br/><br/><label>Dewey Class. No.: </label>516.35  / MAS