Kac, Victor G. <br/><br/>
Infinite dimensional Lie algebras / 
Victor G. Kac. 
 - 3rd ed. 
 - Cambridge :  Cambridge University Press,  1990. 
 - xxi, 400 p. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0521372151 (cased) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lie algebras.