%0 Conference Paper %K Software Product Lines %K Configuration %B The Seventh International Workshop on Variability Modelling of Software-intensive Systems, VaMoS 13, Pisa , Italy, January 23 - 25, 2013 %D 2013 %P 8 %R 10.1145/2430502.2430514 %T Integrating heterogeneous variability modeling approaches with invar %U http://doi.acm.org/10.1145/2430502.2430514 %4 DBLP:conf/vamos/2013