Reference:

Antti Ajanki, David R. Hardoon, Samuel Kaski, Kai Puolamäki, and John Shawe-Taylor. Can eyes reveal interest?—Implicit queries from gaze patterns. User Modeling and User-Adapted Interaction: The Journal of Personalization Research, 19:307–339, 2009.

Suggested BibTeX entry:

@article{Ajanki09,
    author = {Antti Ajanki and David R. Hardoon and Samuel Kaski and Kai Puolam{\"a}ki and John Shawe-Taylor},
    journal = {User Modeling and User-Adapted Interaction: The Journal of Personalization Research},
    pages = {307-339},
    title = {Can Eyes Reveal Interest?---{I}mplicit Queries from Gaze Patterns},
    volume = {19},
    year = {2009},
}