@inproceedings{Hopfgartner:2011c,
 	author={Hopfgartner, Frank and Jose, Joemon M.},
 	title={Development of a test collection for studying long-term user modelling},
 	booktitle={LWA'11 - Proceedings of the Workshop Information Retrieval at Lernen, Wissen, Adaptivit{"a}t, Magdeburg, Germany},
 	year=2011,
         month=09
}