@inproceedings{
    icdt97,
    author = "Mannila, Heikki",
    pages = "41-55",
    booktitle = "Database Theory -- ICDT'97, 6th International Conference",
    year = "1997",
    editors = "F. Afrati and Phokion Kolaitis",
    title = "Methods and problems in data mining"
}