Tal Pasternak Using Trade-Off Analysis to Uncover Links between Functional and Non-Functional Requirements in Use-Case Analysis. 3-9 2003 conf/swste/2003 SwSTE http://doi.ieeecomputersociety.org/10.1109/SWSTE.2003.1245310 db/conf/swste/swste2003.html#Pasternak03