Gilles Perrouin Jacques Klein Nicolas Guelfi Jean-Marc Jézéquel Reconciling Automation and Flexibility in Product Derivation. 339-348 2008 SPLC http://dx.doi.org/10.1109/SPLC.2008.38 conf/splc/2008 db/conf/splc/splc2008.html#PerrouinKGJ08