UML 2: Initiation, exemples et exercices corrigés - Laurent Debrauwer, Fien Van Der Heyde - Google Livres
http://books.google.fr/books?id=FCAoZ0kNL0oC&pg=PT68&lpg=PT68&dq=par+uml+2&source=bl&ots=qtuA44Fk36&sig=z1u46q8oHKyii-ijblpoVXthVLA&hl=fr&ei=00oCTaPYJsWq4AaCwaDHCg&sa=X&oi=book_result&ct=result&resnum=10&ved=0CG0Q6AEwCQ#v=onepage&q&f=false
