@Article{Bla09,
    Author       = "Blanchette, J.",
    Year         = "2009",
    Title        = "{Proof Pearl: Mechanizing the Textbook Proof of Huffman's
                    Algorithm}",
    Journal      = "Journal of Automated Reasoning",
    Volume       = "43",
    Number       = "1",
    Pages        = "1-18",
    Comment      = "TPTPRef"
}