A. Scaria, R. Philip, R. West, and J. Leskovec. Proceedings of the 7th ACM international conference on Web search and data mining, page 213--222. ACM, (2014)
P. Singer, T. Niebler, M. Strohmaier, and A. Hotho. Proceedings of the 22nd international conference on World Wide Web companion, page 171--172. Republic and Canton of Geneva, Switzerland, International World Wide Web Conferences Steering Committee, (2013)