R. Gupta, и S. Sarawagi. Proceedings of the fourth ACM international conference on Web search and data mining, стр. 217--226. New York, NY, USA, ACM, (2011)
W. Jones, A. Phuwanartnurak, R. Gill, и H. Bruce. CHI '05: CHI '05 extended abstracts on Human factors in computing systems, стр. 1505--1508. New York, NY, USA, ACM Press, (2005)