@inproceedings{
    Kaski05mlum,
    editor = "{de la Higuera}, Colin and Arti{\`e}res, Thierry",
    author = {Kaski, Samuel and Myllym{\"a}ki, Petri and Kojo, Ilpo},
    booktitle = "Proceedings of Workshop 4 of the 10th International Conference on User Modeling; Machine Learning for User Modeling: Challenges",
    year = "2005",
    flags = "public",
    pages = "25-26",
    title = "User models from implicit feedback for proactive information retrieval"
}