Jang, Y.H., B.-K. Khim, H.C. Shin, D.M. Sigman, Y. Wang, and C.S. Hong. 2008. “Variation of Nitrate Concentrations and δ15N Values of Seawater in the Drake Passage, Antarctic Ocean”. Ocean and Polar Research 30. Korea Institute of Ocean Science and Technology: 407-18. doi:10.4217/OPR.2008.30.4.407.

Van Oostende, N., S.E. Fawcett, D. Marconi, J. Lueders-Dumont, A.J.M. Sabadel, E.M.S. Woodward, B.F. Jönsson, D.M. Sigman, and B.B. Ward. 2017. “Variation of Summer phytoplankton community Composition and Its Relationship to Nitrate and Regenerated Nitrogen Assimilation across the North Atlantic Ocean”. Deep-Sea Research Part I: Oceanographic Research Papers 121. Elsevier Ltd: 79-94. doi:10.1016/j.dsr.2016.12.012.

Fawcett, S.E., B.B. Ward, M.W. Lomas, and D.M. Sigman. 2015. “Vertical Decoupling of Nitrate Assimilation and Nitrification in the Sargasso Sea”. Deep-Sea Research Part I: Oceanographic Research Papers 103. Elsevier Ltd: 64-72. doi:10.1016/j.dsr.2015.05.004.