Alexander Kotov Paul N. Bennett Ryen W. White Susan T. Dumais Jaime Teevan Modeling and analysis of cross-session search tasks. 5-14 2011 SIGIR http://doi.acm.org/10.1145/2009916.2009922 conf/sigir/2011 db/conf/sigir/sigir2011.html#KotovBWDT11