Kljun, N., PONTON, S., FLANAGAN, L. B., ALSTAD, K. P., JOHNSON, B. G., MORGENSTERN, K., . . . BARR, A. G. (2006). Comparison of ecosystem water-use efficiency among Douglas-fir forest, aspen forest and grassland using eddy covariance and carbon isotope techniques. Global Change Biology, 12(2), pp. 294-310. doi:10.1111/j.1365-2486.2005.01103.x

Kljun, Natascha, STEPHANE PONTON, LAWRENCE B. FLANAGAN, KARRIN P. ALSTAD, BRUCE G. JOHNSON, KAI MORGENSTERN, T. ANDREW BLACK, and ALAN G. BARR. "Comparison of Ecosystem Water-use Efficiency Among Douglas-fir Forest, Aspen Forest and Grassland Using Eddy Covariance and Carbon Isotope Techniques." Global Change Biology 12, no. 2 (2006): 294-310.

Kljun, Natascha, et al. "Comparison of Ecosystem Water-use Efficiency Among Douglas-fir Forest, Aspen Forest and Grassland Using Eddy Covariance and Carbon Isotope Techniques." Global Change Biology 12.2 (2006): 294-310.