Annika Heitmann

Strategic Positioning Options for Scientific Libraries in Markets of Scientific and Technical Information - the Economic Impact of Digitization

Karsten Stroborn, Andreas Geyer-Schulz, Andreas W. Neumann, 2003, J. Digit. Inf..

Internet payments in Germany: a classificatory framework and empirical evidence

Annika Heitmann, Karsten Stroborn, Kay Leibold, 2004 .