TY - JOUR A1 - Kulikowski, D. A1 - Langendörfer, Peter A1 - Piotrowski, Krzysztof T1 - A Location Aware Revocation Approach Y1 - 2011 UR - https://opus4.kobv.de/opus4-UBICO/frontdoor/index/index/docId/5964 ER -