Quay P., Sonnerup R., Munro D., Sweeney C..  2017.  Anthropogenic CO2 accumulation and uptake rates in the Pacific Ocean based on changes in the C-13/C-12 of dissolved inorganic carbon. GLOBAL BIOGEOCHEMICAL CYCLES. 31:59-80.

Quay P., Sonnerup R., Westby T., Stutsman J., McNichol A..  2003.  Changes in the 13C/12C of dissolved inorganic carbon in the ocean as a tracer of anthropogenic CO2 uptake. Global Biogeochemical Cycles. 17:1-4.

Quay P.D, Sonnerup R., Westby T., Stutsman J., McNichol A.P.  2002.  Changes in the 13C/12C of dissolved inorganic carbon in the ocean as a tracer of anthropogenic CO2 uptake. Global Biogeochemical Cycles. 17(1):4-1-4-20.