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Barker C., and Torkelson B.E., (1975), "Gas Absorption on Crushed Quartz and Basalt," Geochemica et Cosmochimica Acta, Volume 39, pp. 212-218.

Williams J.A., Dolcater D.L., Torkelson B.E., and Winters, J.C., (1988), "Anomalous Concentrations of Specific Alkylaromatic and Alkylcycloparaffin Components in West Texas and Michigan Crude Oils," Organic Geochemistry, volume 13, Nos. 1-3, pp. 47-60.

Marzi R., Torkelson B.E., and Olson R.K., (1993), "A Revised Carbon Preference Index," Organic Geochemistry, volume 20, No. 8, pp. 1303-1306.

Michels R., Landais P., Torkelson B.E., and Philip R.P., (1995) "Effects of Confinement and Water Pressure on Oil Generation During Confined Pyrolysis, Hydrous Pyrolysis, and High Pressure Hydrous Pyrolysis," submitted for publication Geochemica et Cosmochimica Acta 59, 1589-1604.

Wigger J.W. and Torkelson B.E. (1997), Petroleum Hydrocarbon Fingerprinting - Numerical interpretation Development, International Petroleum Environmental Conference, San Antonio, Texas

Wigger J.W., Beckmann D.D., Torkelson B.E., and Narang A.X., (1998), Petroleum Hydrocarbon Fingerprinting Quantitative Interpretation: Development and Case Study for Use in Environmental Forensic Investigations, API/NGWA, Petroleum Hydrocarbons and Organic Chemicals in Ground Water: Prevention, Detection, and Remediation, Houston Texas, Nov. 11-13, 1998.

Schmidt G.W., Beckmann D.D., and Torkelson B.E., 1999, Advances in Correlation and Age Dating of Petroleum Products Released to Soils and Groundwater, International Petroleum Environmental Conference, San Antonio, Texas, November 16-18, 1999.

Schmidt G.W., Beckmann D.D., and Torkelson B.E., 2000, Special Cases Interesting Techniques and Gas Chromatograms from Environmental Forensic Subsurface Investitgations, International Petroleum Environmental Conference, Albuquerque, New Mexico, November 7-10, 2000.

Schmidt G.W., Beckmann D.D., and Torkelson B.E., A Technique for Estimating the Age of Regular/Mid-grad Gasolines Released to the Subsurface Since the Early 1970s, Environmental Forensics, 2002, vol. 3, pp. 145-162.

Michels R., Landais P., Philip R.P. and Torkelson B.E., "Effects of Pressure on Organic Matter Maturation During Confined Pyrolysis of Woodford Kerogen, " submitted to Energy and Fuels.

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