@Article{WUF02,
    Author       = "Wos, L. and Ulrich, D. and Fitelson, B.",
    Year         = "2002",
    Title        = "{Vanquishing the XCB Question: The Methodological Discovery of the Last
                    Shortest Single Axiom for the Equivalential Calculus}",
    Journal      = "Journal of Automated Reasoning",
    Volume       = "29",
    Number       = "2",
    Pages        = "107-124",
    Comment      = "TPTPRef"
}