@inproceedings{
    kmsigir,
    author = {Kilpel{\"a}inen, P. and Mannila, Heikki},
    pages = "214--222",
    booktitle = "ACM SIGIR '93: Proceedings of the 16th Annual International Conference on Research and Development in Information Retrieval",
    year = "1993",
    editors = "R. Korfhage and Edie Rasmussen and Peter Willett",
    title = "Retrieval from hierarchical texts using partial patterns"
}