Gilles Ardourel Michael Haupt José Luis Herrero Agustín Rainer Ruggaber Charles Suscheck 11th Workshop for PhD Students in Object-Oriented Systems. 1-6 2001 conf/ecoopw/2001 ECOOP Workshops http://link.springer.de/link/service/series/0558/bibs/2323/23230001.htm db/conf/ecoopw/ecoopw2001.html#ArdourelHARS01