@article {2233,
	title = {The abundance of 13C in marine organic matter and isotopic fractionation in the global biogeochemical cycle of carbon during the past 800 Ma},
	journal = {Chemical Geology},
	volume = {161},
	year = {1999},
	note = {id: 1547},
	month = {1999},
	pages = {103-125},
	author = {Hayes, John M. and Strauss, Harald and Kaufman, Alan J.}
}
