What makes a problem complex?: Factors determining difficulty in dynamic situations and implications for diagnosing complex problem solving competence - Greiff, Samuel; Funke, Joachim (Springer, 2008)
Aus: Zumbach, Jörg [u.a.] (Hrsg.): Beyond knowledge. The legacy of competence. Meaningful computer-based learning environments. Springer, Heidelberg 2008, pp. 199-200