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“Low-BTU Gas in the Permian Chase Group in the Ryersee Field in Western Kansas: A Case History where Technology Creates a Marketable Commodity” Presented at AAPG regional meeting, Tulsa, Oklahoma, October 2003.

“Pitfalls of CO2 Freezing Prediction“ Proceedings of the Eighty-Second GPA Annual Convention, San Antonio, Texas, March 10-12, 2003.

“A Comparative Study of Ethane Recovery Processes“ Proceedings of the Seventy-Nineth GPA Annual Convention, Atlanta, Georgia, March 13-15, 2000.

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“A Comparative Study of Propane Recovery Processes“ Proceedings of the Seventy-Eighth GPA Annual Convention, Nashville, Tennessee, March 1-3, 1999.

“Optimizing Field Compressor Station Designs“ Pennybaker, K.A., SPE Gas Technology Symposium, Calgary, Alberta, Canada, 1998.