Elisavet Konstantinou Vasiliki Liagkou Paul G. Spirakis Yannis C. Stamatiou Moti Yung "Trust Engineering: " From Requirements to System Design and Maintenance - A Working National Lottery System Experience. 44-58 2005 conf/isw/2005 ISC http://dx.doi.org/10.1007/11556992_4 db/conf/isw/isc2005.html#KonstantinouLSSY05