TY - CHAP A1 - Piotrowski, Krzysztof A1 - Langendörfer, Peter A1 - Kulikowski, D. T1 - Moneta: An Anonymity Providing Lightweight Payment System for Mobile Devices Y1 - 2004 ER - TY - JOUR A1 - Kulikowski, D. A1 - Langendörfer, Peter A1 - Piotrowski, Krzysztof T1 - A Location Aware Revocation Approach Y1 - 2004 ER -