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1. |
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§§ 213-255a
Christian Jager, Jorg-Peter Becker, Andreas Mosbacher, Gabriele Cirener, Gunther M Sander
E-bok. De Gruyter, Tyskland, 2012.
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2. |
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Lexikon der Wirtschaftsinformatik
M Sturken, Peter Mertens, Andrea Back, Jorg Becker, Wolfgang Konig
E-bok. Springer Berlin Heidelberg, Tyskland, 2013.
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