@inproceedings{
    ep90,
    author = {Kilpel{\"a}inen, P. and Lind\'en, G. and Mannila, Heikki and Nikunen, E.},
    pages = "139-151",
    booktitle = "EP 90: Proceendings of the International Conference on Electronic Publishing, Document Manipulation \& Typography",
    year = "1990",
    editors = "R. Furuta",
    title = "A structured document database system"
}