@incollection{
    prze:95b,
    author = "Przepiórkowski, Adam",
    url = "http://nlp.ipipan.waw.pl/~adamp/Papers/1995-case/",
    title = "Case Assignment in {P}olish: Towards an {HPSG} Analysis",
    pages = "191--228",
    crossref = "gro:val:96:ed"
}
@book{
    gro:val:96:ed,
    editor = "Grover, Claire and Vallduví, Enric",
    publisher = "Centre for Cognitive Science, University of Edinburgh",
    title = "Studies in {HPSG}",
    series = "Edinburgh Working Papers in Cognitive Science",
    booktitle = "Studies in {HPSG}",
    volume = "12",
    year = "1996"
}