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Report E-Learning in deutschen Unternehmen : Fallstudien, Konzepte, Implementierung
Koellinger, Philipp, (2002)
Why IT matters : an empirical study of e-business usage, innovation, and firm performance
Koellinger, Philipp, (2005)
Why are some entrepreneurs more innovative than others?
Koellinger, Philipp, (2008)