1. Cisco (2016) Cisco Visual Networking Index: Forecast and Methodology 2015–2020. http://www.cisco.com/c/en/us/solutions/collateral/service-provider/visual-networking-index-vni/complete-white-paper-c11-481360 . Accessed 1 June 2016
2. Gao Y, Wang M, Luan H, Shen J, Yan S, Tao D (2011) Tag-based social image search with visual-text joint hypergraph learning in Proc. ACM ICM, pp 1517–1520
3. Gao Y, Wang M, Zha Z-J, Shen J, Li X, Wu X (2013) Visual-textual joint relevance learning for tag-based social image search. IEEE Trans Image Process 22(1):363–376
4. Zanardi V, Capra L (2008) Social ranking: uncovering relevant content using tag-based recommender systems. In: Proc. ACM Rec Sys, pp 51–58
5. Nakamoto R, Nakajima S, Miyazaki J, Uemura S (2007) Tag-based contextual collaborative filtering. In: Proc. 18th IEICE data engineering workshop