Diefendorf, A. F., Mueller, K. E., Wing, S. L., Koch, P. L., & Freeman, K. H. (2010). Global patterns in leaf (13)C discrimination and implications for studies of past and future climate. National Academy of Sciences.

Diefendorf, Aaron F., Kevin E. Mueller, Scott. L. Wing, Paul L. Koch, och Katherine H. Freeman. Global Patterns in Leaf (13)C Discrimination and Implications for Studies of Past and Future Climate. National Academy of Sciences, 2010.

Diefendorf, Aaron F., et al. Global Patterns in Leaf (13)C Discrimination and Implications for Studies of Past and Future Climate. National Academy of Sciences, 2010.