Kienast, Markus (2000): Unchanged nitrogen isotopic composition of organic matter in the South China Sea during the last climatic cycle: Global implications. Paleoceanography, 15(2), 244-253, doi:10.1029/1999PA000407
Nitrogen isotopic composition of bulk sediment in the South China Sea (URI: https://www.ncdc.noaa.gov/paleo/study/2580)