Dickens A.F, Baldock J.A, Smernik R.J, Wakeham S.G, Arnarson T.S, Gelinas Y., Hedges J.I.  2006.  Solid-state 13C NMR analysis of size and density fractions of marine sediments: Insight into organic carbon sources and preservation mechanisms. Geochimica et Cosmochimica Acta. 70:666-686.

Currie L.A, Benner, Jr. B.A, Kessler J.D, Klinedinst D.B, Klouda G.A, Marolf J.V, Slater J.F, Wise S.A, Cachier H., Cary R. et al..  2002.  A Critical Evaluation of Interlaboratory Data on Total, Elemental, and Isotopic Carbon in the Carbonaceous Particle Reference Material, NIST SRM 1649a. J Res Natl Inst Stand Technol. 107(3):279-98.

Hedges J.I, Hu F.S, Devol A.H, Hartnett H.E, Tsamakis E., Keil R.G.  1999.  Sedimentary organic matter preservation: A test for selective degradation under oxic conditions. American Journal of Science. 299(7-9):529-555.

Hartnett H.E, Keil R.G, Hedges J.I, Devol A.H.  1998.  Influence of oxygen exposure time on organic carbon preservation in continental margin sediments. Nature. 391(6667):572-574.