@inproceedings{
    prze:06g,
    author = "Przepiórkowski, Adam",
    pdf = "http://nlp.ipipan.waw.pl/~adamp/Papers/2006-tlt/tlt2006.pdf",
    title = "On Heads and Coordination in a Partial Treebank",
    pages = "163--174",
    crossref = "haj:niv:06:ed"
}
@proceedings{
    haj:niv:06:ed,
    editor = "Hajič, Jan and Nivre, Joakim",
    title = "Proceedings of the Fifth Workshop on Treebanks and Linguistic Theories ({TLT~2006})",
    booktitle = "Proceedings of the Second Workshop on Treebanks and Linguistic Theories ({TLT~2006})",
    address = "Prague",
    year = "2006"
}