Mohamed Amine Chaâbane Eric Andonoff Rafik Bouaziz Lotfi Bouzguenda Versions to Address Business Process Flexibility Issue. 2-14 2009 ADBIS http://dx.doi.org/10.1007/978-3-642-03973-7_2 conf/adbis/2009 db/conf/adbis/adbis2009.html#ChaabaneABB09