1. Critical connections: communications for the future,1990
2. Informatiebeveiliging: state of the art,1993
3. Integrating security activities into the software development lifecycle and the software Quality assurance process;Tompkins;Computers & Security,1986
4. Developing policies, procedures and information security systems;Warman,1995
5. Informatiebeveiliging, een blik achter de schermen;Breed,1995