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Efficient cache coherence strategies are critical to maintain data consistency and provide a reasonable performance of wireless applications with mobile devices. However, the majority of the current strategies for cache coherence in mobile environments have not been designed to be used in cooperative applications. In this paper we propose and describe an implementation of a cache coherence scheme for mobile cooperative work. The scheme is based on periodic broadcast of invalidation reports and provides some aspects of awareness information. The implementation is made through the development of a prototype cooperative application.