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@article{Gittelman:1975ix,
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@Article{Knapp:1975nf,
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@Article{Nash:1976ic,
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@Article{Anderson:1976sd,
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@Article{Anderson:1977hi,
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@Article{Binkley:1981kv,
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@Article{Denby:1983az,
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@Article{Barate:1986fq,
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@Article{Frabetti:1993ux,
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@Article{Breitweg:1997rg,
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@Article{Breitweg:1997we,
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@Article{Ahmed:1994ef,
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@Article{Aid:1996dn,
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@Article{Adloff:2000vm,
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@Article{Chekanov:2004mw,
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     eprint    = "hep-ex/0404008",
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@Article{Aktas:2005xu,
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