Isotopic evidence for Mesoarchean anoxia and changing atmospheric sulfur chemistry.

Farquhar, J., Peters, M., Johnston, D. T., Strauss, H., Masterson, A. L., Wiechert, U., & Kaufman, A. J. (2007). Isotopic evidence for Mesoarchean anoxia and changing atmospheric sulfur chemistry. Nature , 449, 706-709.