Carbon isotope discrimination indicates improving water-use efficiency of trees in northern Eurasia over the last 100 years
Saurer M, Siegwolf RTW & Schweingruber FH
Saurer, M., Siegwolf, R. T. W., & Schweingruber, F. H. (2004). Carbon isotope discrimination indicates improving water-use efficiency of trees in northern Eurasia over the last 100 years. Global Change Biology, 10(12), 2109-2120. https://doi.org/10.1111/j.1365-2486.2004.00869.x