Unipotent and nilpotent classes in simple algebraic groups and Lie algebras  
Liebeck, M. W. 
 - Providence, R.I. :  American Mathematical Society,  2012 
 - 1 online resource (xii, 380 p. : ill.) 
<br/><br/><label>ISBN: </label>9780821869208 | 9780821885109 (online)