Mark-Oliver Reiser Ramin Tavakoli Kolagari Matthias Weber Manifoldness of Variability Modeling - Considering the Potential for Further Integration. 291-303 2007 CEE-SET http://dx.doi.org/10.1007/978-3-540-85279-7_23 conf/ifip2/2007 db/conf/ifip2/ceeset2007.html#ReiserKW07