Q. Ai, L. Yang, J. Guo, и W. Croft. Proceedings of the 2016 ACM International Conference on the Theory of Information Retrieval, стр. 133--142. New York, NY, USA, ACM, (2016)
G. Zuccon, B. Koopman, P. Bruza, и L. Azzopardi. Proceedings of the 20th Australasian Document Computing Symposium, стр. 12:1--12:8. New York, NY, USA, ACM, (2015)