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Berner R A, 1991. A model for atmospheric CO2 over Phanerozoic time. American Journal of Science, 291: 339¡ª376.
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Berner R A, Kothavala Z, 2001. GEOCARB III: a revised model of atmospheric CO2 over Phanerozoic time. American Journal of Science, 301: 182¡ª204.
Retallack G J, 2001. A 300 million-year record of atmospheric carbon dioxide from fossil plant cuticles. Nature, 411: 287¡ª290.
Pearson P.N.,Palmer M.R., Atmospheric carbon dioxide concentrations over the past 60 million years. Nature, 2000. 406(6797): 695-699.
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