Schulze, E. D., Cermák, J., Matyssek, R., Penka, M., Zimmermann, R., Vasícek, F., et al. (1985).
Canopy transpiration and water fluxes in the xylem of the trunk of Larix and Picea trees - a comparison of xylem flow, porometer
and cuvette measurements. Oecologia, 66(4), 475-483.
doi:10.1007/BF00379337.