Lehmann, M.F., D.M. Sigman, D.C. McCorkle, B.G. Brunelle, S. Hoffmann, M. Kienast, G. Cane, and J. Clement. 2005. “Origin of the Deep Bering Sea Nitrate Deficit: Constraints from the Nitrogen and Oxygen Isotopic Composition of Water Column Nitrate and Benthic Nitrate Fluxes”. Global Biogeochemical Cycles 19. doi:10.1029/2005GB002508.

Sigman, D.M., R. Robinson, A.N. Knapp, A. van Geen, D.C. McCorkle, J.A. Brandes, and R.C. Thunell. 2003. “Distinguishing Between Water Column and Sedimentary Denitrification in the Santa Barbara Basin Using the Stable Isotopes of Nitrate”. Geochemistry, Geophysics, Geosystems 4. doi:10.1029/2002GC000384.

Sigman, D.M., M.A. Altabet, D.C. McCorkle, R. François, and G. Fischer. 2000. “The δ15N of Nitrate in the Southern Ocean: Nitrogen Cycling and Circulation in the Ocean Interior”. Journal of Geophysical Research: Oceans 105. Blackwell Publishing Ltd: 19599-614. doi:10.1029/2000jc000265.

Sigman, D.M., M.A. Altabet, R. François, D.C. McCorkle, and J.-F. Gaillard. 1999. “The Isotopic Composition of Diatom-Bound Nitrogen in Southern Ocean Sediments”. Paleoceanography 14: 118-34. doi:10.1029/1998PA900018.

Sigman, D.M., D.C. McCorkle, and W.R. Martin. 1998. “The Calcite Isyocline As a Constraint on Glacial Interglacial Low-Latitude Production Changes”. Global Biogeochemical Cycles 12. American Geophysical Union: 409-27. doi:10.1029/98GB01184.

Sigman, D.M., M.A. Altabet, R. Michener, D.C. McCorkle, B. Fry, and R.M. Holmes. 1997. “Natural Abundance-Level Measurement of the Nitrogen Isotopic Composition of Oceanic Nitrate: An Adaptation of the Ammonia Diffusion Method”. Marine Chemistry 57: 227-42. doi:10.1016/S0304-4203(97)00009-1.

Lehmann, M.F., D.M. Sigman, D.C. McCorkle, J. Granger, S. Hoffmann, G. Cane, and B.G. Brunelle. 2007. “The Distribution of Nitrate 15N 14N in Marine Sediments and the Impact of Benthic Nitrogen Loss on the Isotopic Composition of Oceanic Nitrate”. Geochimica Et Cosmochimica Acta 71: 5384-5404. doi:10.1016/j.gca.2007.07.025.