Jani Metsä Mika Katara Tommi Mikkonen Testing Non-Functional Requirements with Aspects: An Industrial Case Study. 5-14 2007 QSIC http://doi.ieeecomputersociety.org/10.1109/QSIC.2007.62 conf/qsic/2007 db/conf/qsic/qsic2007.html#MetsaKM07