- Lehrbücher der Informatik Spektrum, Heidelberg, 2. Auflage edition, (2008)
- Wirtschaftsinformatik 46(3):171-180 (2004)
- TU Dresden, Dissertation, (2001)
- RWTH Aachen, Dissertation, (1996)
- An evaluative framework for research on the performance effects of information technology investmentICIS '89: Proceedings of the tenth international conference on Information Systems, page 377--388. New York, NY, USA, ACM, (1989)
- International Journal of Information Management 21(5):349-364 (October 2001)
- MIS Quarterly 13(1):3-17 (March 1989)
- Information Systems Management (1990)
- Information Systems Management (1984)
- Information Systems Management (1991)
- European Management Journal 10(2):220-229 (June 1992)
- Executives' perceptions of the business value of information technology: a process-oriented approachJournal of Management Information Systems 16(4):145--173 (March 2000)
- SIGMIS Database 33(2):11--28 (2002)
- Information and Software Technology 39(1):1-13 (1997)
- Information \& Management 2(6):271-278 (1979)
- Management Science 34(5):583-598 (May 1988)
- Management Science Application Series 21(8):908-919 (April 1975)
- International Journal on Information Management 40(1):11--24 (October 2002)
- The Journal of Strategic Information Systems 8(2):189-207 (1999)
- International Journal of Production Economics 35(1-3):137-148 (June 1994)


user