M. De Choudhury, M. Morris, and R. White. Proceedings of the 32Nd Annual ACM Conference on Human Factors in Computing Systems, page 1365--1376. New York, NY, USA, ACM, (2014)
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)