@Article{Bla08,
    Author       = "Blanchette, J.",
    Year         = "2008",
    Title        = "{The Textbook Proof of Huffman's Algorithm}",
    Journal      = "Archive of Formal Proofs",
    Note         = "http://isa-afp.org/entries/Huffman.shtml",
    Comment      = "TPTPRef"
}