Entropy of search logs: how hard is search? with personalization? with backoff?

@inproceedings{mei-2008-entropy, author = {Qiaozhu Mei and Kenneth Ward Church}, editor = {Marc Najork and Andrei Z. Broder and Soumen Chakrabarti}, title = {{Entropy of search logs: how hard is search? with personalization? with backoff?}}, booktitle = {{Proceedings of the International Conference on Web Search and Web Data Mining, WSDM 2008, Palo Alto, California, USA, February 11-12, 2008}}, pages = {45--54}, publisher = {ACM}, year = {2008}, url = {https://doi.org/10.1145/1341531.1341540}, doi = {https://doi.org/10.1145/1341531.1341540} }