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Content distribution applications such as video streaming and file sharing are posing strict requirements on the development and enhancement of architectures and protocols for wireless networks. In this work, we address the problem of collaborative content distribution where destination content-requesting nodes collaborate by sharing over mobile-to-mobile links data blocks received from a source node, e.g., a wireless access point. We propose a dynamic collaborative content distribution protocol that is capable of minimizing the end-to-end distribution delays in the network. Moreover, we present simulation results for three network scenarios to analyze the behavior of the proposed protocol.