Silvano Chiaradonna Felicita Di Giandomenico Paolo Lollini Evaluation of Critical Infrastructures: Challenges and Viable Approaches. 52-77 2007 WADS http://dx.doi.org/10.1007/978-3-540-85571-2_3 conf/icse/2007wads db/conf/icse/wads2007.html#ChiaradonnaGL07