Purple (Maschine) (German Wikipedia)

Analysis of information sources in references of the Wikipedia article "Purple (Maschine)" in German language version.

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doi.org

Wes Freeman, Geoff Sullivan und Frode Weierud: Purple Revealed – Simulation and Computer-aided Cryptanalysis of Angooki Taipu B. Cryptologia, 2003, 27:1, S. 1–43, doi:10.1080/0161-110391891739, S. 1.