1. Shumeet, B.; Rohan, S.; Sivakumar, D.; Jing, Y.; Yagnik, J.; Kumar, S.; Ravichandran, D.; Aly, M.: Video suggestion and discovery for YouTube: taking random walks through the view graph. In: International Conference on World Wide Web, pp. 895–904 (2008)
2. Brynjolfsson, E.; Hu, Y.; Smith, M.D.: Consumer surplus in the digital economy: estimating the value of increased product variety at online booksellers. Manag. Sci. 49(11), 1580–1596 (2003)
3. Zheng, N.; Li, Q.; Shengcai, L.; Leiming, Z.: Which photo groups should I choose? A comparative study of recommendation algorithms in Flickr. Inf. Sci. 36(6), 732–750 (2010)
4. Zhang, X.; Li, Y.: Use of collaborative recommendations for web search: an exploratory user study. J. Inf. Sci. 34(2), 145–161 (2008)
5. Miller, B.N.; Albert, I.; Lam, S.K.; Konstan, J.A.; Riedl, J.: MovieLens unplugged: experiences with an occasionally connected recommender system. In: Proceedings of the 8th International Conference on Intelligent User Interfaces, pp. 263–266