Search task difficulty: the expected vs. the reflected.

@inproceedings{liu-2011-search, author = {Jingjing Liu and Nicholas J. Belkin}, editor = {Wei-Ying Ma and Jian-Yun Nie and Ricardo Baeza-Yates and Tat-Seng Chua and W. Bruce Croft}, title = {{Search task difficulty: the expected vs. the reflected}}, booktitle = {{Proceeding of the 34th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2011, Beijing, China, July 25-29, 2011}}, pages = {1183--1184}, publisher = {ACM}, year = {2011}, url = {https://doi.org/10.1145/2009916.2010110}, doi = {https://doi.org/10.1145/2009916.2010110} }