Ishikawa NF, Butman D, Raymond PA.  2019.  Radiocarbon age of different photoreactive fractions of freshwater dissolved organic matter. Organic Geochemistry. 135:11-15.

Bianchi TS, Butman D, Raymond PA, Ward ND, Kates RJS, Flessa KW, Zamora H, Arellano AR, Ramirez J, Rodriguez E.  2017.  The experimental flow to the Colorado River delta: Effects on carbon mobilization in a dry watercourse. Journal of Geophysical Research: Biogeosciences. 122(3):607-627.

Stubbins A, Hood E, Raymond PA, Aiken GR, Sleighter RL, Hernes PJ, Butman D, Hatcher PG, Striegl RG, Schuster P et al..  2012.  Anthropogenic aerosols as a source of ancient dissolved organic matter in glaciers. Nature Geoscience. 5(3):198-201.