1. Process Design and Costing of an Air-contactor for Air-capture;Heidel;Paper presented at GHGT-10,2010
2. An air-liquid contactor for large-scale capture of CO2 from air. Philosophical Transactions of the Royal Society A – Mathematical;Holmes;Physical & Engineering Sciences,2012
3. Capturing CO2 from the Atmosphere: Rationale and Process Design Considerations. Geo-Engineering Climate Change: Engironmental necessity or Pandora's box?;Keith,2009
4. Process design and energy requirements for the capture of carbon dioxide from air;Baciocchi;Chemical Engineering and Processing,2006
5. Keith, D., Mahmoudkhani, M., Biglioli, A., Hart, B., Heidel, K., & Foniok, M. (2009). United States of America Patent No. US20100064890.