@proceedings{
    kru:oeh:99:ed,
    editor = "Kruijff, Geert-Jan M. and Oehrle, Richard T.",
    title = "Proceedings of {F}ormal {G}rammar 1999",
    booktitle = "Proceedings of {F}ormal {G}rammar 1999",
    address = "Utrecht",
    year = "1999"
}