Applying a Holistic Approach to Develop User-Friendly, Customer-Oriented E-government Portal Interfaces. - Maria Wimmer 001; Ute Holler (User Interfaces for All, 2002)

Specifying Usability Requirements for e-Government Portals: Processes and Target Groups as Key Criteria. - Ute Holler; Maria A. Wimmer (HCI (4), 2003)