Katritzky,A.R…(et.al) <br/><br/>
Hand book of Hetrocyclic chemistry 

 - 2nd 
 - Londan  Pergmon  2004 
 - 703 
<br/><br/><label>ISBN: </label>0-08-042989-0 
<br/><br/><label>Dewey Class. No.: </label>547.59  / KAT