@ARTICLE{RieKruBreMue10,
    author = {Rieck, Konrad and Krueger, Tammo and Brefeld, Ulf and M{\"u}ller, Klaus-Robert},
    title = "Approximate Tree Kernels",
    journal = "Journal of Machine Learning Research",
    year = "2010",
    volume = "11",
    pages = "555--580",
    number = "Feb",
    folder = "mlsec",
    pdf = "http://www.user.tu-berlin.de/konrad.rieck/docs/2010-jmlr.pdf"
}