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.