Kirtland B.C, Aelion C.M, Stone P.A.  2005.  Assessing in situ mineralization of recalcitrant organic compounds in vadose zone sediments using delta(13)C and (14)C measurements. Journal of Contaminant Hydrology. 76(1-2):1-18.

Kirtland B.C, Aelion C.M, Stone P.A, Hunkeler D..  2003.  Isotopic and geochemical assessment of in situ biodegradation of chlorinated hydrocarbons. Environ Sci Technol. 37(18):4205-12.