Copogna, Luca <br/><br/>
Introduction to the Heisenberg Group and the Sub-Riemannian Isoperimetric Problem   
by Luca Capogna., et al 
 - Basel  Birkh user  2007 
 - xvi, 223p 
 - Progress in Mathematics  vol. 259 .
<br/><br/><label>ISBN: </label>3764381329 
<br/><br/><label>Dewey Class. No.: </label>516.35  / P07