1. R. Allis, et al. Natural CO2 reservoirs on the Colorado Plateau and southern Rocky Mountains: Candidates for CO2 sequestration, Utah Geological Survey, 2001.
2. S.H. Stevens, et al. Natural analogs for Geologic Storage of CO2: An Integrated Global Research Program, First National Conference on Carbon Sequestration, May 15–17, 2001, Washington DC.
3. R.L. Nelms, R.B. Burke, Evaluation of oil reservoir characteristics to assess North Dakota carbon dioxide miscible flooding potential, 12th Williston Basin horizontal well and petroleum conference, May 2–4, 2004, Minot, North Dakota.
4. C.R. Nelson, J.M. Evans, J.A. Sorensen, E.N. Steadman, J.A. Harju, Factors affecting the potential for CO2 leakage from geological sinks, Plains CO2 Reduction (PCOR) Partnership, October 2005, Grand Forks, North Dakota.
5. M. Cassidy, Source and occurrences of CO2 as a free gas in the earth’s continental crust as illustrated by Bravo Dome gas field and relation of CO2 deposits to plate tectonic settings, University of Houston, March 21, 2007, Houston Texas.