Yueyue Dai Du Xu Ke Zhang 0008 Sabita Maharjan Yan Zhang 0002 Deep Reinforcement Learning and Permissioned Blockchain for Content Caching in Vehicular Edge Computing and Networks. 4312-4324 2020 69 IEEE Trans. Veh. Technol. 4 https://doi.org/10.1109/TVT.2020.2973705 db/journals/tvt/tvt69.html#DaiXZMZ20