T. Crook, B. Frasca, R. Kohavi, and R. Longbotham. Proceedings of the 15th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, page 1105--1114. New York, NY, USA, ACM, (2009)
S. Doerfel, D. Zoller, P. Singer, T. Niebler, A. Hotho, and M. Strohmaier. Proceedings of the 16th LWA Workshops: KDML, IR and FGWM, Aachen, Germany, September 8-10, 2014., volume 1226 of CEUR Workshop Proceedings, page 18--19. CEUR-WS.org, (2014)
P. Bailey, N. Craswell, I. Soboroff, P. Thomas, A. de Vries, and E. Yilmaz. Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval, page 667--674. New York, NY, USA, ACM, (2008)