Liebig, M.A., Gross, J.R., Tanaka, D.L. 2008. Fallow Contributions to Greenhouse Gas Flux in Dryland Cropping Systems: Observations from a GRACEnet Site in Central North Dakota. IN: ASA-CSSA-SSSA Annual Meeting Abstracts (CDROM), 5-9 October 2008. Houston, TX.
Liebig, M.A., Kronberg, S.L., Gross, J.R. 2008. Effects of Normal and Altered Cattle Urine on Short-term Greenhouse Gas Flux from Mixed-Grass Prairie in the northern Great Plains. Agric. Ecosys. Environ. 125:57-64.
Liebig, M.A., Gross, J.R., Kronberg, S.L., Phillips, R.L. 2007. Global Warming Potential of Long-Term Grazing Management Systems in the Northern Great Plains. IN: Proc. 4th USDA Greenhouse Gas Symposium, 5-8 Feb 2007. Baltimore, MD [CDROM].
Liebig, M.A., Gross, J.R., Kronberg, S.L., Hanson, J.D., Frank, A.B., Phillips, R.L. 2006. Soil response to long-term grazing in the northern Great Plains of North America. Agric. Ecosys. Environ. 115:270-276.
Liebig, M.A., Kronberg, S.L., Gross, J.R., Hanson, J.D., Frank, A.B., Phillips, R.L. 2005. Soil response to long-term grazing in the northern great plains. p. 156. IN: Proc. of the Third USDA Symposium on Greenhouse Gases and Carbon Sequestration in Agriculture and Forestry. 22-24 March 2005, Baltimore, MD.