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Meier, Stefan and Fuchs, Ludwig and Pernul, Günther (2013) Managing the Access Grid - A Process View to Minimize Insider Misuse Risks. In: 11th International Conference on Wirtschaftsinformatik (WI2013), 27.2.-1.3.13, Leipzig.
Penninger, Stefan and Meier, Stefan and Hannes, Federrath (2012) Usability von CAPTCHA-Systemen. In: GI Sicherheit 2012, 07.-09.03.2012, Darmstadt.