The Stacks project

@ARTICLE{Keel,
    AUTHOR = "Keel, Sean",
    TITLE = "Intersection theory of moduli space of stable {$n$}-pointed curves of genus zero",
    JOURNAL = "Trans. Amer. Math. Soc.",
    FJOURNAL = "Transactions of the American Mathematical Society",
    VOLUME = "330",
    YEAR = "1992",
    NUMBER = "2",
    PAGES = "545--574"
}