Philippe Lahire Brice Morin Gilles Vanwormhoudt Alban Gaignard Olivier Barais Jean-Marc Jézéquel Introducing Variability into Aspect-Oriented Modeling Approaches. 498-513 2007 conf/models/2007 MoDELS http://dx.doi.org/10.1007/978-3-540-75209-7_34 db/conf/models/models2007.html#LahireMVGBJ07