@incollection{
    Niemela2011:nmr30,
    editor = "Brewka, Gerhard and Marek, Victor W. and Truszczy\'nski, Miros{\l}aw",
    author = {Marek, Victor W. and Niemel{\"a}, Ilkka and Truszczy\'nski, Miros{\l}aw},
    publisher = "College Publications",
    language = "eng",
    title = "Origins of Answer-Set Programming -- Some Background and Two Personal Accounts",
    booktitle = "Nonmonotonic Reasoning: Essays Celebrating its 30th Anniversary",
    address = "London, UK",
    corerank = "NA",
    responsibleauthor = {Niemel{\"a}, Ilkka},
    flags = "LOGIC MCM HIIT",
    il = "yes",
    year = "2011",
    unitcode = "T306=99,T312=1",
    impactfactor = "A3",
    pages = "233--258"
}