Xiuyan Guo Jun Li Jian Yang Jinlin Wang The Research on Dynamic Replication and Placement of File Using Dual-Threshold Dynamic File Migration Algorithm. 236-240 2008 CSSE (3) http://dx.doi.org/10.1109/CSSE.2008.951 conf/csse/2008-3 db/conf/csse/csse2008-3.html#GuoLYW08