Diversity as a defense strategy in information systems. Does evidence from previous events support such an approach?. - Charles Bain; Donald B. Faatz; Amgad Fayad; Douglas E. Williams (IICIS, 2001)

A User Friendly Guard with Mobile Post-Release Access Control Policy. - Douglas E. Williams; Amgad Fayad; Sushil Jajodia; Daniel Calle (SEC, 2003)