Hecke algebras with unequal parameters  
Lusztig, George, 
 - Providence, R.I. :  American Mathematical Society,  2003 
 - vi, 136 p. :  ill. ;  26 cm. 
 - CRM monograph series,  v. 18 .
<br/><br/><label>ISBN: </label>0821833561 (alk. paper)