@book{
    muel:13:ed,
    editor = "Müller, Stefan",
    publisher = "CSLI Publications",
    title = "Proceedings of the {HPSG\,2013} Conference",
    url = "http://www.stanford.edu/group/cslipublications/cslipublications/HPSG/2013/toc.shtml",
    booktitle = "Proceedings of the {HPSG\,2013} Conference",
    year = "2013",
    address = "Stanford, CA"
}