Improvements that don't add up: ad-hoc retrieval results since 1998.

@inproceedings{armstrong-2009-improvements, author = {Timothy G. Armstrong and Alistair Moffat and William Webber and Justin Zobel}, editor = {David Wai-Lok Cheung and Il-Yeol Song and Wesley W. Chu and Xiaohua Hu and Jimmy Lin}, title = {{Improvements that don't add up: ad-hoc retrieval results since 1998}}, booktitle = {{Proceedings of the 18th ACM Conference on Information and Knowledge Management, CIKM 2009, Hong Kong, China, November 2-6, 2009}}, pages = {601--610}, publisher = {ACM}, year = {2009}, url = {https://doi.org/10.1145/1645953.1646031}, doi = {https://doi.org/10.1145/1645953.1646031} }