D. X.  Flores-Cervantes, Plata, D. L., MacFarlane, J. K., Reddy, C. M., and Gschwend, P. M., ?Black carbon in marine particulate organic carbon: Inputs and cycling of highly recalcitrant organic carbon in the Gulf of Maine?, Marine Chemistry, vol. 113, no. 3-4, pp. 172-181, 2009.