R. Kumar, A. Tomkins, S. Vassilvitskii, and E. Vee. Proceedings of the Eighth ACM International Conference on Web Search and Data Mining, page 359--368. ACM, (2015)
P. Singer, D. Helic, A. Hotho, and M. Strohmaier. International Conference on World Wide Web, page 1003--1013. Republic and Canton of Geneva, Switzerland, International World Wide Web Conferences Steering Committee, (2015)