Duc A. Tran Khanh Nguyen Cuong Pham 0002 S-CLONE: Socially-aware data replication for social networks. 2001-2013 2012 56 Comput. Networks 7 https://doi.org/10.1016/j.comnet.2012.02.010 db/journals/cn/cn56.html#TranNP12