Dag Karlsen

The External Intelligent Infrastructure

Frank Lillehagen, Dag Karlsen, Dag Runar Elvekrok, 2003, PRO-VE.

Visual extended enterprise engineering and operation-embedding knowledge management and work execution

Frank M. Lillehagen, Dag Karlsen, 2001 .

Enterprise Architectures – Survey of Practices and Initiatives

Frank Lillehagen, Dag Karlsen, F. Lillehagen, 2005 .