Julio Sincero Wolfgang Schröder-Preikschat Olaf Spinczyk Towards Tool Support for the Configuration of Non-Functional Properties in SPLs. 1-7 2009 HICSS http://dx.doi.org/10.1109/HICSS.2009.472 conf/hicss/2009 db/conf/hicss/hicss2009.html#SinceroSS09