W. J. Mitsch, “Ecological Engineering: The Roots and Rationale of a New Ecological Paradigm,” In: C. Etnier and B. Guterstam. Eds., Ecological Engineering for Wastewater Treatment, Bokskagen, Gothensburg, 1991, pp. 19-37.
 H. L. Bohn, G. K. Prososki and J. G. Eckhardt, “Hydrocar- bon Absorption by Soils as the Stationary Phase of Gas-Solid Chromatography,” Journal of Environmental Quality, Vol. 9, No. 4, 2008, pp. 563-565. doi:10.2134/jeq1980.00472425000900040005x
 G. Leson and A. M. Winer, “Biofiltration: An Innovative Air Pollution Control Technology for VOC Emissions,” Journal of the Air & Waste Management Association, Vol. 41, No. 8, 1991, pp. 1045-1054.
 J. Nikiema, L. Bideau and J. Lavoie, “Biogas: A Real Problem; Biofiltration: A Promising Solution,” In: J. S. Devinny, Ed., Proceedings 2004 Conference on Biofiltra- tion for Air Pollution Control, USC Center for Sustain- able Cities and Department of Civil and Environmental Engineering, Los Angeles, 2004, pp. 73-80.
 D. H. Kampbell, J. T. Wilson, H. W. Read and T. T. Stocksdale, “Removal of Volatile Aliphatic Hydrocarbons in a Soil Bioreactor,” Journal of the Air & Waste Man- agement Association, Vol. 7, No. 10, 1987, pp. 1236-1240.
 C. Van Lith, G. Leson and R. Michelson, “Evaluating Design Options for Biofilters,” In: F. E. Reynolds, Ed., Proceedings 1996 Conference on Biofiltration, University of Southern California, The Reynolds Group, Tustin, 1996, pp. 102-127.
 J. Devinny, “Topics for Research in Biofiltration,” In: D. S. Hodge and F. E. Reynolds, Eds., Proceedings 1995 Conference on Biofiltration, University of Southern California, The Reynolds Group, Tustin, 1995, pp. 6-13.
 E. R. Rene, D. V. S. Murthy and T. Swaminathan, “Steady- and Transient-State Effects during the Biological Oxidation of Gas-Phase Benzene in a Continuously Oper- ated Biofilter,” Clean Technology and Environmental Policy, Published 2009 online.
 M. Nelson, W. F. Dempster, N. Alvarez-Romo and T. MacCallum, “Atmospheric Dynamics and Bioregenerative Technologies in a Soil-Based Ecological Life Support System: Initial Results from Biosphere 2,” Advances in Space Research, Vol. 14, No. 11, 1994, pp. 417-426. doi:10.1016/0273-1177(94)90331-X
 M. Nelson and W. F. Dempster, “Living in Space: Results from Biosphere 2’s Initial Closure, an Early Testbed for Closed Ecological Systems on Mars,” In: C. R. Stoker and C. Emment, Eds., Strategies for Mars: A Guide to Human Exploration, AAS Publication, San Diego, Vol. 86, 1996, pp. 363-390.
 R. Frye and C. Hodges, “Soil Bed Reactor Work of the Environmental Research Laboratory of the University of Arizona in Support of the Biosphere 2 Project,” In: M. Nelson and G. Soffen, Eds., Biological Life Support Systems, NASA Conference Proceedings 3094, Synergetic Press, Oracle, 1990, pp. 33-40.
 W. J. Rippstein and H. J. Schneider, “Toxicological Aspects of the Skylab Program,” In: R. S. Johnston and L. F. Dietlin, Eds., Biomedical Results from Skylab, NASA SP-377, U.S. Government Printing Office, Washington DC, 1977.
 G. Wu, J. C. Chabot, J. J. Caron and M. Heitz, “Biological Elimination of Volatile Organic Compounds from Waste Gases in a Biofilter,” Water, Air and Soil Pollution, Vol. 101, No. 1-4, 1998, pp. 69-78. doi:10.1023/A:1004914919615
 S. Y. Park, K. W. Brown and J. C. Thomas, “The Use of Biofilters to Reduce Atmospheric Methane Emissions from Landfills: Part 1, Biofilter Design,” Water, Soil and Air Pollution, Vol. 155, No. 1-4, 2004, pp. 63-85. doi:10.1023/B:WATE.0000026522.36984.42