Das Workspace-Konzept - neu verpackt im eLearning! - Katrin Borcea-Pfitzmann; Katja Liesebach; Hagen Wahrig (DeLFI Workshops, 2005)

Towards Privacy-Aware eLearning. - Katrin Borcea; Hilko Donker; Elke Franz 001; Andreas Pfitzmann; Hagen Wahrig (Privacy Enhancing Technologies, 2005)

Access Control in a Privacy-Aware eLearning Environment. - Elke Franz 001; Hagen Wahrig; Alexander Böttcher; Katrin Borcea-Pfitzmann (ARES, 2006)

Collaborative E-Learning. - Katja Liesebach; Elke Franz 001; Anne-Katrin Stange; Andreas Juschka; Katrin Borcea-Pfitzmann; Alexander Böttcher; Hagen Wahrig (Digital Privacy - PRIME, 2011)