Building a multimedia ISDN PC. - Michael Jäger; Utz Osterfeld; Hans-Josef Ackermann; Christoph Hornung (IEEE Computer Graphics and Applications, 1993)

Integration of Live Video and Computer Graphics for Video Effect Generation. - Utz Osterfeld; Hans-Josef Ackermann (Workshop on Graphics Hardware, 1994)

COBRA Cooperation within Bureau Research and Administration. - Utz Osterfeld; Christoph Hornung (Inform. Forsch. Entwickl., 1995)