Katja De Vries, Rocco Bellanova, Paul De Hert, Serge Gutwirth. The German Constitutional Court Judgment on Data Retention: Proportionality Overrides Unlimited Surveillance (Doesn't It?). In Serge Gutwirth, Yves Poullet, Paul De Hert, Ronald Leenes, editors, Computers, Privacy and Data Protection: an Element of Choice. pages 3-23, Springer, 2011. [doi]
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