Alexopoulos, Georgios K. <br/><br/>
Sub-laplacians with drift on lie groups of polynomial volume growth   
by Georgios K Alexopoulos 
 - Providence  American Mathematical Society  2002 
 - xi, 101p 
 - Memoirs of the American Mathematical Society  vol 155 No.739 .
<br/><br/><label>ISBN: </label>0821827642 
<br/><br/><label>Dewey Class. No.: </label>512.55  / P02