S. Dumais, E. Cutrell, J. Cadiz, G. Jancke, R. Sarin, и D. Robbins. SIGIR '03: Proceedings of the 26th annual international ACM SIGIR conference on Research and development in informaion retrieval, стр. 72--79. ACM Press, (2003)
J. Teevan, S. Dumais, и D. Liebling. SIGIR '08: Proceedings of the 31st annual international ACM SIGIR conference on Research and development in information retrieval, стр. 163--170. New York, NY, USA, ACM, (2008)