@incollection{
    BNT:krhandbook,
    editor = "van Harmelen, Frank and Lifschitz, Vladimir and Porter, Bruce",
    author = {Brewka, Gerhard and Niemel\"a, Ilkka and aw Truszczy\'nski, Miros\l},
    chapter = "6",
    publisher = "Elsevier Science",
    responsibleauthor = {Niemel{\"a}, Ilkka},
    title = "Nonmonotonic Reasoning",
    booktitle = "Handbook of Knowledge Representation",
    address = "Amsterdam",
    month = "",
    note = "",
    flags = "ACPT",
    year = "2008",
    impactfactor = "C",
    pages = "239--284"
}