A Pleistocene ice core record of atmospheric O2 concentrations

D. A. Stolper, M. L. Bender, G. B. Dreyfus, Y. Yan, J. A. Higgins
2016 Science  
doi:10.1126/science.aaf5445 pmid:27708037 fatcat:237at2y3dbedpc5pqjog5dtmtu