Reference:

Jarkko Salojärvi, Kai Puolamäki, and Samuel Kaski. Relevance feedback from eye movements for proactive information retrieval. In Proceedings of the Processing Sensory Information for Proactive Systems (PSIPS '04), 2004.

Suggested BibTeX entry:

@inproceedings{Salojarvi05psips,
    author = {Jarkko Saloj\"arvi and Kai Puolam\"aki and Samuel Kaski},
    booktitle = {Proceedings of the Processing Sensory Information for Proactive Systems (PSIPS '04)},
    title = {Relevance Feedback from Eye Movements for Proactive Information Retrieval},
    year = {2004},
}