@article {DBLP:journals/ton/JiaoLXDF16, title = {Optimizing Cost for Online Social Networks on Geo-Distributed Clouds}, journal = {{IEEE/ACM} Trans. Netw.}, volume = {24}, number = {1}, year = {2016}, pages = {99{\textendash}112}, doi = {10.1109/TNET.2014.2359365}, url = {https://doi.org/10.1109/TNET.2014.2359365}, author = {Lei Jiao and Jun Li and Tianyin Xu and Wei Du and Xiaoming Fu} }