Ulrike Dowie Nicole Gellner Sven Hanssen Andreas Helferich Georg Herzwurm Sixten Schockert Quality Assurance of Integrated Business Software: An Approach to Testing Software Product Lines. 2005 conf/ecis/2005 ECIS http://is2.lse.ac.uk/asp/aspecis/20050106.pdf db/conf/ecis/ecis2005.html#DowieGHHHS05