@InProceedings{JonesHTS11, author = {Timothy Jones and David Hawking and Paul Thomas and Ramesh Sankaranarayana}, title = {Relative effect of spam and irrelevant documents on user interaction with search engines}, booktitle = {Proceedings of CIKM}, pages = {2113--2116}, month = {Oct}, year = {2011}, location = {Glasgow}, note = {\url{https://david-hawking.net/pubs/jones_cikm11.pdf}} }