Yanbo Lu Jie Hao 0001 Xin-Ji Liu Shu-Tao Xia Network coding for data-retrieving in cloud storage systems. 51-55 2015 NetCod https://doi.org/10.1109/NETCOD.2015.7176788 conf/netcod/2015 db/conf/netcod/netcod2015.html#LuHLX15