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Zimov, SA, Davidod SP, Zimova GM, Davidova AI, Chapin FS, et al. Contribution of disturbance to increasing seasonal amplitude of atmospheric CO2. Science. 1999;284:1973–6.

Zimov, W. S., et al. “Contribution of disturbance to increasing seasonal amplitude of atmospheric CO2.” Science, vol. 284, 1999, pp. 1973–76.

Zimov, SA, Davidod SP, Zimova GM, Davidova AI, Chapin FS, Chapin MC, REYNOLDS J. Contribution of disturbance to increasing seasonal amplitude of atmospheric CO2. Science. 1999;284:1973–1976.