Geng, L., Alexander, B., Cole-Dai, J., Steig, E. J., Savarino, J., Sofen, E. D., & Schauer, A. J. (2014). Nitrogen isotopes in ice core nitrate linked to anthropogenic atmospheric acidity change. National Academy of Sciences.

Geng, Lei, Becky Alexander, Jihong Cole-Dai, Eric J. Steig, Joël Savarino, Eric D. Sofen, and Andrew J. Schauer. Nitrogen Isotopes in Ice Core Nitrate Linked to Anthropogenic Atmospheric Acidity Change. National Academy of Sciences, 2014.

Geng, Lei, et al. Nitrogen Isotopes in Ice Core Nitrate Linked to Anthropogenic Atmospheric Acidity Change. National Academy of Sciences, 2014.