Dhafer Thabet Lamia Hassine Henda Hajjami Ben Ghézala Situational Secure Web Services Design Methods. 2 2007 ICSEA http://doi.ieeecomputersociety.org/10.1109/ICSEA.2007.61 conf/icsea/2007 db/conf/icsea/icsea2007.html#ThabetHG07