• Ciais, P., P. P. Tans, M. Trolier, J. W. C. White, and R. J. Francey, A large northern hemisphere terrestrial CO2 sink indicated by the 13C/12C ratio of atmospheric CO2, Science, 269, 10981102, 1995.
  • Clegg, S., J. F. Kelly, M. Kimura, and T. B. Smith, Combining genetic markers and stable isotopes to reveal leapfrog migration in a Neotropical migrant, Wilson's warbler (Wilsonia pusilla), Mol. Ecol., 12, 819830, 2003.
  • Ehleringer, J. R., J. F. Casale, M. J. Lott, and V. L. Ford, Tracing the geographical origin of cocaine, Nature, 408, 311312, 2000.
  • Ehleringer, J. R., G. J. Bowen, L. A. Chesson, A. G. West, D. W. Podlesak, and T. E. Cerling, Hydrogen and oxygen isotope ratios in human hair are related to geography, Proc. Natl. Acad. Sci. U. S. A., 105, 2788279310.1073/pnas.0712228105, 2008.
  • Elliott, E. M., C. Kendall, S. D. Wankel, D. A. Burns, E. W. Boyer, K. Harlin, D. J. Bain, and T. J. Butler, Nitrogen isotopes as indicators of NOx source contributions to atmospheric nitrate deposition across the midwestern and northeastern United States, Environ. Sci. Technol., 41, 76617667, 2007.
  • Ferguson, P. R., N. Weinrauch, L. I. Wassenaar, B. Mayer, and J. Veizer, Isotope constraints on water, carbon, and heat fluxes from the northern Great Plains region of North America, Global Biogeochem. Cycles, 21, GB202310.1029/2006GB002702, 2007.
  • , Tracking Animal Migration With Stable IsotopesHobson, K. A., and L. I. Wassenaar, 182, Elsevier, Amsterdam, 2008.
  • Norris, D. R., P. P. Marra, G. J. Bowen, L. M. Ratcliffe, J. A. Royale, and T. K. Kyser, Migratory connectivity of a widely distributed songbird, the American Redstart (Setophaga ruticilla)Ornithol. Monogr. Ser., 61, Patterns of Migratory Connectivity in Two Nearctic-Neotropical Songbirds: New Insights From Intrinsic MarkersBoulet, M., and D. R. Norris, 1428, Am. Ornithol. Union, McLean, Va., 2006.
  • Rayner, P. J., R. M. Law, C. E. Allison, R. J. Francey, C. M. Trudinger, and C. Pickett-Heaps, Inter-annual variability of the global carbon cycle (19922005) inferred by inversion of atmospheric CO2 and d13CO2 measurements, Global Biogeochem. Cycles, 22, GB300810.1029/2007GB003068, 2008.
  • Worden, J., D. Noone, and K. Bowman, Importance of rain evaporation and continental convection in the tropical water cycle, Nature, 4457127, 52853210.1038/nature05508, 2007.