S. Dumais, G. Buscher, and E. Cutrell. Proceeding of the third symposium on Information interaction in context, page 185--194. New York, NY, USA, ACM, (2010)
A. Muralidharan, Z. Gyongyi, and E. Chi. Proceedings of the 2012 ACM annual conference on Human Factors in Computing Systems, page 1085--1094. New York, NY, USA, ACM, (2012)