@article {5990,
	title = {A whiff of oxygen before the Great Oxidation Event?},
	journal = {Science},
	volume = {317},
	year = {2007},
	pages = {1903-1906},
	author = {A.D. Anbar and Y. Duan and T.W. Lyons and G.L. Arnold and B. Kendall and R.A. Creaser and A.J. Kaufman and G.W. Gordon and C. Scott and J. Garvin and R. Buick}
}