Towards Displaying Privacy Information with Icons. - Leif-Erik Holtz; Katharina Nocun; Marit Hansen (PrimeLife, 2010)

Datenschutzkonformes Social Networking: Clique und Scramble! - Leif-Erik Holtz (Datenschutz und Datensicherheit, 2010)

Legal Policy Mechanisms. - Leif-Erik Holtz; Jan Schallaböck (Privacy and Identity Management for Life, 2011)

Privacy Policy Icons. - Leif-Erik Holtz; Harald Zwingelberg; Marit Hansen (Privacy and Identity Management for Life, 2011)