@article {111231,
	title = {Uncovering the Neoproterozoic carbon cycle},
	journal = {Nature},
	volume = {483},
	number = {7389},
	year = {2012},
	pages = {320-323},
	author = {Johnston, D.T. and Macdonald, F.A. and Gill, B.C. and Hoffman, P.F. and Schrag, D.P.}
}
