The Metaphor of Virtual Rooms in the Cooperative Learning Environment CLear. - Hans-Rüdiger Pfister; Christian Schuckmann; Jennifer Beck-Wilson; Martin Wessner (CoBuild, 1998)

Soziale und kognitive Orientierung in einer computergestützten kooperativen Lernumgebung. - Hans-Rüdiger Pfister; Martin Wessner; Jennifer Beck-Wilson (Software-Ergonomie, 1999)