Michel Wermelinger Paul Wernick Ciarán Bryce Report on the 4th international ERCIM workshop on software evolution and evolvability (Evol '08). 25-27 2009 34 ACM SIGSOFT Software Engineering Notes 2 http://doi.acm.org/10.1145/1507195.1507218 db/journals/sigsoft/sigsoft34.html#WermelingerWB09